CliRef, a copy/paste from whatisdb (somehow ordered)…

cliref.md

_________ _____ _______________       _____
\_   ___ \\    \\___________   \____ / ____\     ~/.bash/cliref.md
/    \  \/|    | |   ||       _/ __ \  __\    copy/paste from whatisdb
\     \___|__  |_|_  ||    |   \  __/|_ |   http://pastebin.com/yGmGiDQX
 \________  /_____ \_||____|_  /____  /_|     [email protected]
 20160515 \/ 1527 \/         \/     \/

---

alias CLIRef.txt='curl -s "http://pastebin.com/raw/yGmGiDQX" | less -i'
alias CLIRef.md='lynx "https://gist.github.com/yunga/b036ac9749524e312fb8#file-cliref-md"'

Content

Other Documentation	Getting Help	Interesting Pages
Shells	Network	Directories
Terminal Tools	Wireless	Files
.	Network Monitor	Pipes
Setup	Network Tunnels	File Attributes
System	Network Scan	File Find
Kernel	Network Capture	File Compare
Init and Runlevels	Network Filesystems	Binary Information
Hardware	Network Apps	File Managers
Filesystem Tools	Modem/Fax/GSM	Viewers
Quotas	Network File Transfer	Editors
Processes	Browser	Text Utilities
Performances	RSS Reader	Print
User Management	Podcast	Compression
User Information	Chat	Encryption
Environment	EMail	Backup
Security Context	Newsgroups	CD/DVD/BluRay
.	Websites	.
.	.	.
Development	ASCII Art	Numbers and Math
Debugging	Images	Date and Time
Revision Control	Vector Graphics	Schedule
Database	3D	Office
.	Videos	Spelling
Games	Audio and Music	Publishing
Screensavers	Audio Players	Task Managers
Other	Audio Editing	Conversion
X Windows	Midi	.
Funny	Text to Speech	.

Other Documentation

Local directories

manpages       /usr/man/                      /usr/share/man/
infopages      /usr/info/                     /usr/share/info/
packages       /usr/doc/                      /usr/share/doc/
linux doc prj  /usr/doc/ldp/                  /usr/share/doc/ldp/
howtos         /usr/doc/howto/                /usr/share/doc/howto/
mini howtos    /usr/doc/howto/mini/           /usr/share/doc/howto/mini/
kernel         /usr/src/linux/documentation/
x window       /usr/x11r6/lib/x11/doc/
apache         /home/httpd/html/manual/       /var/www/html/manual/
latex doc      /usr/share/texmf/doc/latex/latex2e-html/
tex            /usr/share/texmf/doc/

On the Web

• [The Linux man-pages project] (https://www.kernel.org/doc/man-pages/)
• [Linux Manpages Online] (http://man.cx/)
• [Ubuntu Manpage Repository] (http://manpages.ubuntu.com/)
• [ArchWiki] (https://wiki.archlinux.org/)
• [Debian Wiki] (https://wiki.debian.org/)
• [Debian Admin's Handbook] (https://debian-handbook.info/browse/stable/)
• [The Linux Documentation Project] (http://tldp.org/)
• [GreyCat's wiki] (http://mywiki.wooledge.org/)
• [Bash Hackers Wiki] (http://wiki.bash-hackers.org/)
• [Rosetta Stone for Unix] (http://bhami.com/rosetta.html)
• [Unix Toolbox] (http://cb.vu/unixtoolbox.xhtml)
• [Inconsolation] (https://inconsolation.wordpress.com/)
• [Command Line Kung Fu] (http://blog.commandlinekungfu.com/)
• [CommandLineFu] (http://www.commandlinefu.com/)
• [Unix Mages] (http://unixmages.com/)
• [SuperUser] (https://superuser.com/)
• [Ask Ubuntu] (https://askubuntu.com/)
• [Unix on StackExchange] (https://unix.stackexchange.com/)
• [Shell subreddits] (https://www.reddit.com/r/bash+bashtricks+commandline+scriptswap+shell+zsh)

Tools:

• ShellCheck (http://www.shellcheck.net/)
• [ExplainShell] (http://explainshell.com/)
• [Coding Ground] (http://www.tutorialspoint.com/codingground.htm)

Manpages Sections on various platforms

Section	General use on various unix platforms

0      | c library header files
1      | general commands
1c     | communications
1g     | graphics
1m     | maintenance, system administration commands and daemons
2      | system calls
3      | library functions, in particular the c standard library
3c     | c programming language
3f     | fortran programming language
3m     | miscellaneous programming routines
4      | special files, devices, drivers, formats and conventions
5      | file formats and conventions miscellanea
6      | games and screensavers
7      | miscellanea, special files, devices and drivers
8      | system administration commands and daemons
9      | kernel routines
l      | local, some programs install pages here instead of (1)
n      | tcl/tk keywords
x      | the x window system
?p     | perl scripts man pages
?posix | posix man pages
?fun   | funny command lines

Getting Help

Command	Description
man	an interface to the on-line reference manuals
apropos	search the manual page names and descriptions
whatis	display manual page descriptions
whichman	search for a man page using a fault tolerant search
info	read info documents
help	shell built-in help
debmany	show documentation from installed packages
debian-reference	open the post-installation user's guide in browser
type	display information about command type
konqueror	browse man:/info:/perldoc:/etc. thanks to kio
popbugs	find release critical bugs in packages you use

Interesting Pages

Manpage	Description
intro.1	user commands
intro.2	system calls
intro.3	library functions
intro.4	special files
intro.5	file formats
intro.6	games
intro.7	overview/conventions/miscellany section
intro.8	administration and privileged commands
undocumented.7	no manpage for this program, utility or function
missing	missing manual pages
LDP	linux documentation project with help and guides
man-pages	conventions for writing linux man pages
environ	user environment
hier	description of the filesystem hierarchy
file-hierarchy	file system hierarchy overview
capabilities	overview of linux capabilities
signal	overview of signals
standards	standards - c and unix standards
units.7	units, kilo/kibi/mega, decimal and binary prefixes
libc	overview of standard c libraries on linux
posixoptions	optional parts of the posix standard
errno	look up errno names and descriptions
errno.3	number of last error
undocumented.3	undocumented library functions
printf	formatted output conversion
strftime	format date and time
acl	access control lists
ascii	report character aliases
ascii.7	ascii characters in octal, decimal, and hexadecimal
unicode	universal character set
locale.7	description of multilanguage support
readline	get a line from a user with editing (inputrc)
terminfo	terminal capability data base
bash	gnu bourne-again shell
zsh	the z shell
glob	globbing pathnames
regex	posix.2 regular expressions
pcrepattern	pcre - perl-compatible regular expressions
pcresyntax	pcre - perl-compatible regex syntax summary
perlintro	brief introduction and overview of perl
perlcheat	perl 5 cheat sheet
gittutorial	a tutorial introduction to git
random	kernel random number source devices

Shells

Command	Description
sh	shell, the standard command language interpreter
bash	gnu bourne-again shell
fish	the friendly interactive shell
zsh	the z shell
fizsh	friendly interactive zshell
ksh	kornshell, a command and programming language
pdksh	legacy kornshell built on mksh
mksh	mirbsd kornshell
csh	a shell with c-like syntax
tcsh	c shell with file name completion and cli editing
ash	the almquist shell
dash	the debian almquist shell
rc	a shell for plan 9 and unix systems
git-sh	a git shell (bash)
shellcheck	analyzes shell scripts and points out typical issues

Terminal Tools

Command	Description
screen	screen manager with vt100/ansi terminal emulation
tmux	terminal multiplexer
byobu	wrapper script for seeding configuration to screen/tmux
dvtm	dynamic virtual terminal manager
twin	textmode window environment
dtach	program that emulates the detach feature of screen
reptyr	reparent a running program to a new terminal/screen
kibitz	allow two people to interact with one shell
script	make typescript of terminal session
scriptreplay	play back typescripts, using timing information
ttyrec	a tty recorder
ttyplay	player of the tty session recorded by ttyrec
clear	clear the screen
reset	terminal initialization
openvt	start a program on a new virtual terminal (vt)
chvt	change foreground virtual terminal
deallocvt	deallocate unused virtual terminals
tty	display the name of the terminal connected to stdin
stty	change and print terminal line settings
tabs	set terminal tabs
setterm	set terminal attributes
tput	change terminal characteristics
tic	the terminfo entry-description compiler
toe	table of (terminfo) entries
infocmp	compare or print out terminfo descriptions
captoinfo	convert a termcap description into terminfo description
infotocap	convert a terminfo description into termcap description

Setup

Command	Description
apt-get	apt package handling utility (debian)
apt-config	apt configuration query program
apt-cache	query the apt cache
apt-file	apt package searching utility
dlocate	program to view debian package information
whohas	find packages in various distributions repositories
apt-mark	mark/unmark a package as being automatically-installed
debfoster	weed unnecessary debian packages
deborphan	orphaned package finder
dgrep	grep through files belonging to an installed package
dglob	expand package names or files matching a pattern
dpigs	show which installed packages occupy the most space
popularity-contest	list the most popular packages on the system
popcon-largest-unused	list size of unused packages on the system
popbugs	find release critical bugs in packages used
which-pkg-broke	find which package might have broken another
dpkg	package manager for debian
dpkg-reconfigure	reconfigure an already installed package
debconf	run a debconf-using program
debconf-get-selections	output contents of debconf database
debconf-set-selections	insert new values into the debconf database
update-alternatives	maintain symlinks for default commands
update-manager	graphical management of software updates
dselect	debian package management frontend
aptitude	high-level interface to the package manager
synaptic	graphical management of software packages (xwindows)
alien	convert or install an alien binary package (rpm, deb)
smart	the smart package manager (apt/rpm/yum/etc)
yum	yellowdog updater modified (redhat)
rpm	rpm package manager (redhat)
urpmi	rpm downloader/installer/dependency solver (mandriva)
zypper	interface to zypp system management (opensuse)
pacman	package manager utility (archlinux)
yaourt	more than a frontend to pacman (archlinux)
stow	software package installation manager (with symlinks)
checkrestart	check which processes need a restart after an upgrade

System

Command	Description
inxi	lists kernel/drivers/cpu/ram/gcc/xorg/desktop/etc.
nmon	systems administrator, tuner, benchmark tool
collectl	collects data that describes the current system status
binstats	display statistics about programs and libraries
uptime	view the system load and how long it has been running
times	show process times for the shell and its child
lsb_release	print distribution-specific information
uname	print system/kernel information
arch	print machine hardware name (same as uname -m)
nproc	print the number of processing units available
procinfo	display system statistics gathered from /proc
mpstat	report processors related statistics
saidar	a curses-based tool for viewing system statistics
perf-top	system profiling tool
lmbench	system benchmarks
sysbench	a modular, multi-threaded benchmark tool
sar	collect, report, or save system activity information
hostid	print the numeric identifier for the current host
free	display amount of free/used/swap memory in the system
swapon	enable device and file for paging and swapping
swapoff	disable devices and files for paging and swapping
vmstat	report virtual memory statistics
dstat	versatile tool for generating system resource stats
iostat	report cpu and io statistics for dev, part and nfs
iotop	simple top-like i/o monitor
fio	flexible i/o tester
blktrace	generate traces of the i/o traffic on block devices
blockdev	call block device ioctls from the command line
slabtop	display kernel slab cache information in real time
tload	graphic representation of system load average
logger	a shell interface to the syslog system log module
logwatch	system log analyzer and reporter
swatch	simple watcher
imvirt	detects several virtualizations

Kernel

Command	Description
lsmod	program to show the status of modules in linux kernel
insmod	simple program to insert a module into the linux kernel
rmmod	simple program to remove a module from the linux kernel
modinfo	program to show information about a linux kernel module
modprobe	program to add and remove modules from the linux kernel
modconf	a module configuration utility
depmod	program to generate modules.dep and map files
sysctl	configure kernel parameters at runtime

Init and Runlevels

Command	Description
initctl	upstart service configuration
start	init daemon control tool
stop	init daemon control tool
status	init daemon control tool
chkconfig	enable or disable system services
service	run a system v init script
sysv-rc-conf	run-level configuration for sysv like init script links
runlevel	output previous and current runlevel
telinit	change system runlevel
checkrestart	check which processes need a restart after an upgrade
systemctl	control the systemd system and service manager
journalctl	query the systemd journal
loginctl	control the systemd login manager
halt	reboot or stop the system
reboot	reboot or stop the system
shutdown	shutdown or restart the system
poweroff	reboot or stop the system

Hardware

Command	Description
x86info	display x86 cpu diagnostics
dmesg	print kernel and driver messages
hdparm	get/set sata/ide device parameters
smartctl	control and monitor utility for smart disks
badblocks	search a device for bad blocks
setserial	get/set linux serial port information
wvdial	ppp dialer with built-in intelligence
lshw	list hardware
lshal	lists all devices the hardware abstraction layer knows
lsdev	display information about installed hardware
lsblk	list block devices
lsusb	list usb devices
lspci	list all pci devices
setpci	configure pci devices
pnpdump	dump isa plug-and-play devices resource information
isadump	examine isa registers
scsiinfo	query information from a scsi device
sginfo	access mode page information for a scsi/atapi device
sg_map	displays mapping between linux sg and scsi devices
udevadm	udev management tool
ethtool	query or control network driver and hardware settings
mii-tool	view, manipulate media-independent interface status
dmidecode	dmi table decoder
hwinfo	probe for hardware
acpitool	acpi client, allowing you to query or set acpi values
apm	interface with the apm subsystem
alsamixer	soundcard mixer for alsa driver
aumix	adjust audio mixer
pactl	control a running pulseaudio sound server
rexima	a curses-based (and command-line) mixer
alsactl	advanced controls for alsa soundcard driver
showkey	examine the codes sent by the keyboard
loadkeys	load keyboard translation tables
dumpkeys	dump keyboard translation tables
setleds	set the keyboard leds
imvirt	detects several virtualizations

Filesystem Tools

Command	Description
df	report file system disk space usage
discus	print a report of disk space usage
mount	mount a filesystem
umount	unmount file systems
mhddfs	combines a several mount points into a single one
fusermount	mount and unmount fuse filesystems
findmnt	find a filesystem
mountpoint	see if a directory is a mountpoint
sync	flush disk caches
mkfs	build a linux file system
tune2fs	adjust tunable filesystem parameters on ext2/ext3/ext4
fsck	check and repair a linux file system
badblocks	search a device for bad blocks
debugfs	ext2/ext3/ext4 file system debugger
fdisk	partition table manipulator for linux
cfdisk	curses/slang based disk partition table manipulator
parted	a partition manipulation program
fdformat	low-level format a floppy disk
mtools	utilities to access dos disks in unix
lilo	install linux boot loader
grub	install grand unified bootloader
dd	convert/copy a file, write disk headers, boot records
ddrescue	data recovery tool
dcfldd	enhanced version of dd for forensics and security
foremost	recover files using their headers/footers/structures
photorec	recover lost files from hdisk, digital camera and cdrom
safecopy	data recovery tool

Quotas

Command	Description
quota	display disk usage and limits
repquota	summarize quotas for a filesystem
setquota	set disk quotas
edquota	edit user quotas
quotaon	turn filesystem quotas on
quotaoff	turn filesystem quotas off
quotacheck	scan for disk usage, create, check, repair quota files
convertquota	convert quota from old file format to new one

Processes

Command	Description
ps	report a snapshot of the current processes
w	show who is logged on and what they are doing
top	monitor processes
htop	interactive process viewer
atop	at computing system & process monitor
gitps	a visual process viewer/killer (gnu interactive tools)
glances	a cross-platform curses-based system monitoring tool
pidstat	report statistics for linux tasks
powertop	program to analyze power consumption on intel laptops
prtstat	print statistics of a process
pstree	display a tree of processes
whowatch	console, interactive, process and users monitoring tool
kill	send a signal to a process
killall	kill all processes named proc
pidof	find the process id of a running program
pkill	signal processes based on name and other attributes
pgrep	lookup processes based on name and other attributes
skill	send a signal or report process status
snice	send a signal or report process status
nice	set/run a program with modified scheduling priority
renice	alter priority of running processes
ionice	set or get process i/o scheduling class and priority
cpulimit	limits the cpu usage of a process
taskset	retrieve or set a process cpu affinity
setuid	run a command with a different uid
setsid	run a program in a new session
nohup	runs a command immune to hangups, outputs to a non-tty
disown	shell built-in, removes each jobs from shell
jobs	lists the active jobs
bg	lists stopped or background jobs, resume a stopped job
fg	brings the most recent job to foreground
time	time a simple command
timeout	run a command with a time limit
uux	remote command execution
uustat	uucp status inquiry and job control
ipcs	report interprocess communication facilities status
ipcrm	remove message, semaphore, or shared memory identifier

Performances

See Brendan D. Gregg [Linux Perf page] (http://www.brendangregg.com/linuxperf.html)

Command	Description
collectl	collects data that describes the current system status
glances	a cross-platform curses-based system monitoring tool
uptime	view the system load and how long it has been running
mpstat	report processors related statistics
lmbench	system benchmarks
sysbench	a modular, multi-threaded benchmark tool
sar	collect, report, or save system activity information
free	display amount of free/used/swap memory in the system
swapon	enable/disable device and file for paging and swapping
vmstat	report virtual memory statistics
dstat	versatile tool for generating system resource stats
iostat	report cpu and io statistics for dev, part and nfs
iotop	simple top-like i/o monitor
fio	flexible i/o tester
blktrace	generate traces of the i/o traffic on block devices
slabtop	display kernel slab cache information in real time
sysctl	configure kernel parameters at runtime
hdparm	get/set sata/ide device parameters
ps	report a snapshot of the current processes
top	monitor processes
htop	interactive process viewer
pidstat	report statistics for linux tasks
nice	set/run a program with modified scheduling priority
renice	alter priority of running processes
ionice	set or get process i/o scheduling class and priority
taskset	retrieve or set a process cpu affinity
sysdig	a system-level exploration and troubleshooting tool
ltrace	a library call tracer
strace	trace system calls and signals
errno	look up errno names and descriptions
explain	explain system call error messages
stap	systemtap script translator driver
ktap	lightweight script-based dynamic tracing tool for linux
llttng	tracer control command line tool
perf	performance analysis tools for linux
tiptop	display hardware performance counters for linux tasks
ethtool	query or control network driver and hardware settings
iperf	perform network throughput tests
pchar	perform network measurements along an internet path
ping	check if host is reachable
hping3	send (almost) arbitrary tcp/ip packets to network hosts
traceroute	print the route packets trace to network host (see mtr)
mtr	traceroute and ping programs diagnostic tool
nicstat	print network traffic statistics
netstat	print connections, routing, masquerade, multicast stats
ss	another utility to investigate sockets
socklist	display list of open sockets
sockstat	list open sockets
iptraf	interactive colorful ip lan monitor
tcpdump	dump traffic on a network
darkstat	network statistics gatherer
justniffer	an extensive tcp flow sniffer
snmpget	communicates with a network using snmp get requests
lldptool	manage the lldp settings and status of lldpad
tune2fs	adjust tunable filesystem parameters on ext2/ext3/ext4
dd	convert/copy a file, write disk headers, boot records
siege	an http/https stress tester
tsung	distributed multi-protocol load testing tool

User Management

Command	Description
adduser	add a user or group to the system
useradd	create a new user or update default user information
userdel	delete a user account and related files
usermod	modify a user account
newusers	update and create new users in batch
groupadd	create a new group
groupdel	delete a group
groupmod	modify a group definition on the system
newgrp	log in to a new group
chage	change user password expiry information
chfn	change real user name and information
chsh	change login shell
passwd	change user password

User Information

Command	Description
id	print real and effective user and group ids
groups	print group names a user is in
sa	summarizes accounting information
ac	print statistics about users connect time
who	print all usernames currently logged in
whowatch	console, interactive, process and users monitoring tool
whoami	print effective userid
rwho	determine all users logged on your local network
w	show who is logged on and what they are doing
last	show listing of last logged in users
lastb	show listing of bad loggin attemps
lastlog	reports recent login of all users or of a given user
lastcomm	print information about previously executed commands
users	print the user names of users currently logged in
logname	print the login name of a user
talk	talk to another user
ytalk	multi-user chat program
write	send a message to another user
wall	write a message to users
mesg	control write access to your terminal

Environment

Command	Description
printenv	print all or part of environment
env	run a program in a modified environment
locale	get locale-specific information
localedef	compile locale definition files

Security Context

Command	Description
su	change user id or become superuser
sudo	execute a command as another user
sudoedit	edit one or more files as another user
op	grant trusted users access to certain root operations
runcon	run command with specified security context (selinux)
chcon	change file security context (selinux)
chroot	run command or interactive shell with special root dir
schroot	securely enter a chroot environment
rarun2	run programs with different env/args/perms/dirs/etc

Development

Command	Description
perl	the perl language interpreter
perldoc	look up perl documentation in pod format
perltidy	a perl script indenter and reformatter
perlcritic	command-line interface to critique perl source
perlbug	how to submit bug reports on perl
cpan	easily interact with cpan from the command line
txt2regex	a regular expression wizard
ruby	interpreted object-oriented scripting language
irb	interactive ruby
gem	the front end to rubygems
python	an interpreted, object-oriented programming language
pydoc	the python documentation tool
pycompile	byte compile python source files
pychecker	program to check python scripts for common mistakes
ghc	the glasgow haskell compiler
ghci	the glasgow haskell compiler
lua	lua interpreter
luac	lua compiler
luadoc	generate documentation from files
luarocks	module deployment system for lua
node	server-side javascript
js_beautify	command tool to beautify your javascript files
jq	command-line json processor
jsoncat	display json data
jsonlint	json syntax validator and formatter tool
java	the java application launcher
javac	java programming language compiler
javadoc	the java api documentation generator
jardiff	visualise api differences between two jar files
php	php command line interface cli
clisp	ansi common lisp compiler, interpreter and debugger
fort77	fortran compiler
f2c	convert fortran 77 to c or c++
fc	frontend script to the f2c fortran compiler
nasm	the netwide assembler, a portable 80x86 assembler
yasm	the yasm modular assembler
as	the portable gnu assembler
rasm2	assemble and disassemble files or hexpair strings
gcc	gnu project c and c++ compiler
gprof	display call graph profile data
ld	the gnu linker
c99	compile standard ansi c programs
cpp	the c preprocessor
make	gnu make utility to maintain groups of programs
dmake	maintain program groups, or interdependent files
cmake	cross-platform makefile generator
cxref	generate a c-language program cross-reference table
ctags	generate tag file for emacs, vi
cflow	generate a c-language flowgraph
cscope	interactively examine a c program
sloccount	count source lines of code (sloc)
cloc	count lines of source code and comments
pepper	repository statistics and report tool
astyle	indentation and reformatting filters c, c++, c#, java
indent	reformat a c program, inserting or deleting whitespace
bcpp	make c++ beautifier
uncrustify	c, c++, c#, d, java and pawn source code beautifier
xmlstarlet	command line xml/xslt toolkit
xmllint	command line xml tool
xgrep	search content of xml file via xpath or curstom search
xmlcatalog	parse and manipulate xml or sgml catalog files
xalan	process xml documents with xslt stylesheets
xmlindent	xml stream reformatter
tidy	validate, correct, and pretty-print html files
csstidy	css parser and optimiser
highlight	universal code highlighter converter (html, rtf, ...)
lex	generate programs for lexical tasks
strip	remove unnecessary information from executable files
m4	macro processor
yacc	yet another compiler compiler
flex	lexical analyser, generates code for pattern-matching
gencat	generate a formatted message catalog
getconf	get configuration values
errno	look up errno names and descriptions
explain	explain system call error messages

Debugging

Command	Description
gdb	the gnu debugger
r2	advanced hexadecimal editor, disassembler and debugger
elfsh	the elsf shell
e2dbg	the embedded elf debugger
readelf	displays information about elf files
rabin2	get information about elf/pe/mz/class
objdump	display information from object files
objcopy	copy and translate object files
nm	list symbols from object files
lsof	list open files/streams/sockets/etc
lslk	list local locks
fuser	identify processes using files or sockets
trace-cmd	interacts with ftrace linux kernel internal tracer
trace-cmd-list	list available plugins, events or options for ftrace
pstack	print a stack trace of running processes
dtrace	tune and troubleshoot programs and system (systemtap)
sysdig	a system-level exploration and troubleshooting tool
etrace	the embedded elf tracer
eresi	the eresi reverse engineering software interface
errno	look up errno names and descriptions
explain	explain system call error messages
strace	trace system calls and signals
ltrace	a library call tracer
mtrace	interpret output from malloc_trace
xtrace	trace communication between x11 client and server
stap	systemtap script translator driver
ktap	lightweight script-based dynamic tracing tool for linux
llttng	tracer control command line tool
perf	performance analysis tools for linux
perf-stat	run a command and gather performance counter statistics
perf-list	list all symbolic event types
tiptop	display hardware performance counters for linux tasks
babeltrace	babeltrace trace viewer and converter for (ctf)
memdump	memory dumper
scanmem	locate and modify a variable in an executing process
crash	analyze linux crash dump data or a live system
binwalk	binary image search tool
strings	extract printable strings
ident	identify rcs keyword strings in files
pmap	report memory map of a process
ldd	print shared library dependencies
ldconfig	configure dynamic linker run-time bindings
ld.so	dynamic linker-loader
/lib/ld-linux.so.2	dynamic linker-loader
/lib64/ld-linux-x86-64.so.2	dynamic linker-loader

Revision Control

Command	Description
rcs	change rcs file attributes
ci	check in rcs revisions
co	check out rcs revisions
git	the stupid content tracker
tig	text-mode interface for git
bzr	bazaar next-generation distributed version control
cvs	concurrent versions system
darcs	an advanced revision control system
hg	mercurial source code management system
svn	subversion command line client tool

Database

Command	Description
sqlite3	command line interface for sqlite version 3
sqlite	a command line interface for sqlite
psql	postgresql interactive terminal
mysql	the mysql command-line tool
sql	execute a command on a database determined by a dburl
rrdtool	round robin database tool and grapher

Network

Command	Description
ip	show/manip routing, devices, policy routing and tunnels
tc	show/manipulate traffic control settings
ifconfig	set/display network information
ifdata	get network interface info without ifconfig parsing
ifstat	report interface statistics
ifdown	stop a network interface
ifup	bring a network interface up
ethtool	query or control network driver and hardware settings
mii-tool	view, manipulate media-independent interface status
nmcli	command-line tool for controlling networkmanager
nmtui	text user interface for controlling networkmanager
nm-tool	utility to report networkmanager state and devices
iperf	perform network throughput tests
nuttcp	network performance measurement tool
pchar	perform network measurements along an internet path
route	show/manipulate the ip routing table
hostname	print the system hostname
domainname	show or set the system nis/yp domain name
dnsdomainname	show the system dns domain name
nisdomainname	show or set the system's nis domain name
ypdomainname	show or set the system's yp domain name
whois	client for the whois directory service
dnstracer	trace a chain of DNS servers to the source
ping	check if host is reachable
hping3	send (almost) arbitrary tcp/ip packets to network hosts
traceroute	print the route packets trace to network host (see mtr)
tracepath	traces path to a network host, discovering mtu along
mtr	traceroute and ping programs diagnostic tool
netstat	print connections, routing, masquerade, multicast stats
lsof	list open files/streams/sockets/etc
ss	another utility to investigate sockets
host	dns lookup utility
dig	dns lookup utility
nslookup	query internet name servers interactively
zonecheck	dns zone checking tool
nc	netcat, arbitrary tcp and udp connections and listens
cryptcat	twofish encryption enabled version of nc
ncat	concatenate and redirect sockets
socat	multipurpose relay (socket cat)
faucet	a fixture for a bsd network pipe (netpipes)
hose	the client end of a bsd network pipe (netpipes)
arping	arp find out ethernet address by first arping then arp
arp	manipulate the system arp cache
arpwatch	keep track of ethernet/ip address pairings
arpspoof	intercept packets on a switched lan
rarp	manipulate the system rarp table
ufw	program for managing a netfilter firewall
iptables	administration tool for ipv4 filtering and nat
ip6tables	ipv6 packet filter administration
iptables-save	dump iptables rules to stdout
ip6tables-save	dump iptables rules to stdout
iptables-restore	restore ip tables
ip6tables-restore	restore ipv6 tables
iptstate	top-like display of ip tables state table entries
ipchains	control the packet filter/firewall (see iptables)
ipcalc	ipv4 netmask/broadcast/etc calculator
ipv6calc	a small utility to manipulate ipv6 addresses
sipcalc	ip subnet calculator
subnetcalc	ipv4/ipv6 subnet calculator
tcpkill	kill tcp connections on a lan
tcpnice	slow down tcp connections on a lan
sshow	ssh traffic analysis tool
sshmitm	ssh monkey-in-the-middle
smbclient	ftp-like client to access smb/cifs resources on servers
ntptrace	trace a chain of ntp servers back to the primary source
snmpget	communicates with a network using snmp get requests
snmpwalk	retrieve a management values subtree using snmp getnext
snmpcmd	behaviour common to most of the net-snmp commands
lldpad	link layer discovery protocol (lldp) agent daemon
lldptool	manage the lldp settings and status of lldpad
suricata	next generation intrusion detection and prevention tool

Wireless

Command	Description
iw	show/manipulate wireless devices and configuration
iwconfig	configure a wireless network interface
iwlist	detailed information about a wireless interface
iwevent	show wireless events generated by drivers and hardware
iwgetid	report essid, nwid, ap/cell address of wireless network
wavemon	a wireless network monitor
kismet	wireless sniffing and monitoring

Network Monitor

Command	Description
ntop	display top network users
ntopng	display top network users
nload	displays the current network usage
cbm	display the current traffic on all network devices
sntop	top-like console network status tool
iftop	display bandwidth usage on an interface by host
jnettop	view hosts/ports taking up the most network traffic
bmon	bandwidth monitor and rate estimator
bwn-ng	a live monitor for network and disk io
speedometer	display the rate of data across a network connection
netload	network device load monitor
nethogs	a small net top tool, displays usage per process
slurm	yet another network load monitor
vnstat	a console-based network traffic monitor
nicstat	print network traffic statistics
pktstat	display packet activity
iptraf	interactive colorful ip lan monitor
netwatch	ethernet internet protocol monitor
trafshow	full screen show network traffic
tcptrack	monitor tcp connections on the network
tcpreen	tcp stream monitoring tool
wavemon	a wireless network monitor

Network Tunnels

Command	Description
ip	show/manip routing, devices, policy routing and tunnels
ip-tunnel	tunnel configuration
stunnel	universal ssl tunnel
ptunnel	tunnel tcp connections over icmp packets
udptunnel	tunnel udp packets over a tcp connection

Network Scan

Command	Description
nmap	network exploration tool and security / port scanner
ndiff	utility to compare the results of nmap scans
scapy	interactive packet manipulation tool
nping	network packet generation tool / ping utility
arp-scan	the arp scanner
sslscan	fast ssl scanner
xprobe2	a remote active operating system fingerprinting tool
p0f	identify remote systems passively

Network Capture

Command	Description
wireshark	interactively dump and analyze network traffic
tshark	dump and analyze network traffic
scapy	interactive packet manipulation tool
dumpcap	dump network traffic
tcpspy	tcp/ip connection monitor
tcpdump	dump traffic on a network
tcptrace	a tcp connection analysis tool
tcpick	tcp stream sniffer and connection tracker
tcpflow	tcp flow recorder
snort	packet sniffer/logger and intrusion detection system
pcapdump	dedicated packet capture utility
pcapip	filter a pcap for ip addresses
pcappick	pick specific frames out of a pcap file by number
pcapuc	filter a pcap for ip addresses
ettercap	sniffer/content filter for man in the middle attacks
ngrep	network grep
tetheral	dump and analyze network traffic
sniffit	packet sniffer and monitoring tool
httpry	http logging and information retrieval tool
dsniff	password sniffer (lots of protocols)
kismet	wireless sniffing and monitoring

Network Filesystems

Command	Description
exportfs	maintain table of exported nfs file systems
showmount	show mount information for an NFS server
nfsstat	list nfs statistics
nfsiostat	report input/output statistics for nfs
sshfs	filesystem client based on ssh
curlftpfs	mount a ftp host as a local directory
flickrfs	virtual filesystem for flickr photosharing service

Network Apps

Command	Description
ssh	openssh ssh client (remote login program)
cssh	cluster admin tool, multiple ssh connection
ssh-copy-id	install public key in a remote machine authorized_keys
ssh-keygen	authkey generation, management and conversion
rsh	remote shell
crsh	cluster admin tool, multiple rsh connection
rlogin	openssh ssh client (remote login program)
telnet	log into remote hosts
ctel	cluster admin tool, multiple telnet connection
ccon	cluster admin tool, multiple console connection
uux	remote command execution
uustat	uucp status inquiry and job control
finger	user information lookup program

Modem/Fax/GSM

Command	Description
minicom	friendly serial communication program
efax	send/receive faxes with class 1, 2 or 2.0 fax modem
mgetty	smart data/fax modem getty
fax	fax sending and receiving with mgetty+sendfax
sendfax	submit a facsimile job for transmission
sendpage	submit a pager job for transmission
faxstat	for hylafax facsimile server status
faxspool	queue and convert files for faxing with sendfax
faxq	display fax jobs queued by faxspool
faxrunq	send fax jobs queued by faxspool
faxrm	remove fax jobs queued by faxspool
faxalter	alter parameters of a queued hylafax job
fax2ps	convert a tiff facsimile to compressed postscript
faxcover	generate postscript cover page for outgoing facsimile
faxmail	hylafax mail-to-fax (postscript) gateway application
textfmt	convert ascii text to postscript for facsimile
gammu	does some neat things with your cellular phone or modem

Network File Transfer

Command	Description
curl	transfer a url (swiss army tool)
wget	the non-interactive network downloader
httrack	offline browser : copy websites to a local directory
linkchecker	check html documents and websites for broken links
woof	a small, simple, stupid webserver to share files
wput	wget-like ftp-uploader
sftp	secure file transfer program
ncftp	browser program for the file transfer protocol
ncftpget	internet file transfer program for scripts
ncftpput	internet file transfer program for scripts
ftp	copy files between hosts
lftp	sophisticated file transfer program
scp	securely copy files between hosts
rcp	remote file copy
uucp	system-to-system copy
mulk	parallel network downloader with filtering and metalink
axel	light download accelerator (best imo)
aria	fast download utility (http, ftp, bittorrent, metalink)
aria2c	the ultra fast download utility http/ftp/bt/metalink
ctorrent	download bittorrent files from command line
rtorrent	a bittorrent client for ncurses
mktorrent	simple bittorrent metainfo file creator
bittorrent-downloader	download files using a scatter-gather network
btdownloadcurses	download files using a scatter-gather network
amulecmd	console-based program to control amule
get_flash_videos	downloader for flash-based video sites
rmtpdump	rtmp streaming media client
youtube-dl	download video from youtube or other video platforms
quvi	query media tool for parsing flash streams url
cclive	downloading media streams from youtube and similars
nc	netcat, arbitrary tcp and udp connections and listens
cryptcat	twofish encryption enabled version of nc
ncat	concatenate and redirect sockets
socat	multipurpose relay (socket cat)
faucet	a fixture for a bsd network pipe (netpipes)
hose	the client end of a bsd network pipe (netpipes)
trickle	a lightweight userspace bandwidth shaper

Browser

Command	Description
lynx	a general purpose, text-only browser for the www
links	lynx-like alternative character mode www browser
links2	lynx-like alternative character mode www browser
elinks	lynx-like alternative character mode www browser
netrik	the antrik internet browser
w3m	a text based web browser and pager
edbrowse	text editor and web browser
httrack	offline browser : copy websites to a local directory
surfraw	fast search/bookmarks access to various www clients
gopher	connect to gopher document server

RSS Reader

Command	Description
newsbeuter	an rss feed reader for text terminals
rsstail	console based rss news reader
canto	an ncurses rss reader
raggle	console rss aggregator
olive	console rss reader
rawdog	rss aggregator without delusions of grandeur
nrss	an ncurses rss reader
snownews	console rss newsreader

Podcast

Command	Description
hpodder	scan and download podcasts
podget	simple tool to automate downloading of podcasts
podracer	a podcast aggregator with bittorrent support

Chat

Command	Description
centerim	text mode based im client for linux
finch	instant messaging client (frontend to libpurple)
pork	console-based aol instant messenger & irc client
freetalk	a console based jabber client
mcabber	a simple jabber console client
ekg	gadu-gadu compatible client
BitchX	an advanced internet relay chat client
irssi	a modular irc client for unix
weechat	wee enhanced environment for chat
bitlbee	irc gateway to im chat networks
epic5	internet relay chat client for unix like systems
tinyirc	basic irc commands and an curses-based interface
ii	a minimalistic fifo and filesystem based irc client
sic	an extremly fast, small and simple irc client
tircd	an ircd proxy to the twitter api
talk	talk to another user
ytalk	multi-user chat program
write	send a message to another user
wall	write a message to users
mesg	control write access to your terminal

EMail

Command	Description
mail	minimal client to send and receive mail
mailx	send and receive internet mail
msmtp	an smtp client
mutt	text-based email client
alpine	internet news and email
notmuch	thread-based email index, search, and tagging
cone	read and send e-mail messages
elmo	the electronic mail operator
fetchyahoo	retrieve mail from yahoo webmail service
urlscan	browse the urls in an email message from a terminal

Newsgroups

Command	Description
slrn	an easy to use nntp / spool based newsreader
trn	threaded read news program
tin	usenet newsreader
nn	efficient net news interface (no news is good news)

Websites

Command	Description
shell-fm	console-based player for last.fm radio streams
google	command-line access to (some) google services
gcalcli	google calendar command line interface
episoder	tv show reminder from epguides.com and thetvdb.com
youtube-dl	download video from youtube or other video platforms
get_flash_videos	downloader for various flash-based video sites
quvi	query media tool for parsing flash streams url
cclive	downloading media streams from youtube and similars
twyt	command line twitter client
bti	send a tweet to twitter.com from the command line
tircd	an ircd proxy to the twitter api
twidge	microblogging client for twitter, identica
weather	obtain weather conditions and forecasts

Directories

Command	Description
cd	change directory
pwd	print name of current/working directory
mkdir	make directories
rmdir	remove empty directories
tree	list contents of directories in a tree-like format
dirdiff	display diff and merge changes between directories
pushd	sh: add directories to stack
popd	sh: remove dir from stack, changes to the new top dir
dirs	display directory stack (pushd/popd)

Files

Command	Description
ls	list directory contents and files
dir	briefly list files
vdir	verbosely list directory contents
tree	list contents of directories in a tree-like format
dircolors	color setup for ls
df	report file system disk space usage
dfc	display file system space usage using graphs and colors
pydf	report colourised filesystem disk space usage
du	estimate file space usage
ncdu	ncurses disk usage
agedu	correlate disk usage and last-access times
touch	create file, change file timestamps
fallocate	preallocate or deallocate space to a file
truncate	shrink or extend the size of a file
dd	convert/copy a file, write disk headers, boot records
cp	copy files and directories
mcp	copy files by wildcard patterns
qcp	copy files editing the names in a text editor
install	copy files and set attributes
mv	move (rename) files
mmv	move files by wildcard patterns
rename	rename files by replacing expressions
prename	renames multiple files with perl expression
qmv	rename files editing the names in a text editor
convmv	converts filenames from one encoding to another
vidir	edit a directory in your text editor
detox	clean up filenames
rm	remove files or directories
unlink	call the unlink function to remove the specified file
shred	overwrite a file to hide its contents, and delete it
wipe	securely erase files from magnetic media
gitwipe	an utility for wiping files (gnu interactive tools)
ln	make filesystem links
mln	link files by wildcard patterns
sln	link files (statically linked)
link	create a hard link to a file
readlink	print value of a symbolic link or canonical file name
cleanlinks	remove dangling symbolic links and empty directories
hardlink	Hardinks multiple copies of a file
stow	software package installation manager (with symlinks)
mkfifo	create named pipe
mknod	make block or character special files
mktemp	create a temporary file or directory
flock	manage locks from shell scripts
basename	strip directory and suffix from filenames
dirname	convert a full pathname to just a path
realpath	print the resolved path
pathchk	check whether file names are valid or portable
inotifywatch	gather filesystem access statistics using inotify
inotifywait	wait for changes to files using inotify
trash	trash utility compliant with freedesktop.org
trash-list	list trashed files
trash-restore	restore for command line trash utility
trash-empty	empty for command line trash utility

Pipes

Command	Description
tee	read from stdin, write to stdout and files
multitee	send multiple inputs to multiple outputs
pee	tee standard input to pipes
xargs	build and execute command lines from standard input
parallel	run programs in parallel
mispipe	pipe two commands returning the exit status of the first
pv	monitor the progress of data through a pipe
sponge	soaks up all standard input and write to a file after
stdbuf	run command with modified buffering for its stdstreams
ifne	run command if the standard input is not empty
ts	timestamp input
vipe	insert a text editor into a pipe

File Attributes

Command	Description
umask	set default file protections
stat	display file attributes or file system status
touch	change file timestamps
chown	change file owner and group
chgrp	change group ownership
chmod	change file mode bits
chattr	change advanced file attributes on a linux file system
lsattr	list advanced file attributes on a ext file system
getfattr	get extended attributes of filesystem objects
setfattr	set extended attributes of filesystem objects
getfacl	get file access control lists
setfacl	set file access control lists
test	check file types and compare values

File Find

Command	Description
find	search for files in a directory hierarchy
ftff	fault tolerant file find utility
updatedb	update a database for m/slocate
locate	locate files via index (m/slocate)
doodle	a tool to search the meta-data in your files
which	locate a command
whereis	locate binary, source, and manual page for a command
fdupes	finds duplicate files in a given set of directories
rdfind	finds duplicate files
findimagedupes	finds visually similar or duplicate images
hardlink	Hardinks multiple copies of a file

File Compare

Command	Description
diff	compare files line by line
zdiff	compare compressed files
bzdiff	compare compressed files
diff3	compare three files line by line
diffstat	make histogram from diff-output
rfcdiff	compare rfcs or internet drafts or any other text files
merge	three-way file merge
wdiff	display word differences between text files
sdiff	side-by-side merge of file differences
mcdiff	visual shell for unix-like systems
ndiff	utility to compare the results of nmap scans
bsdiff	generate a patch between two binary files
rdiff	binary diff tool for signature-based differences
quilt	tool to manage series of patches
bspatch	apply a patch built with bsdiff
patch	apply a diff file to an original
unify	transforms context diffs into unidiffs, or vice-versa
combine	combine lines from two files using boolean operations
comm	compare two sorted files line by line
cmp	compare two files byte by byte
zcmp	compare compressed files
bzcmp	compare compressed files
cksum	checksum and count the bytes in a file
sum	checksum and count the blocks in a file
md5sum	compute and check md5 message digest
md5pass	create an md5 password hash
shasum	print or check sha checksums
rhash	print or check ed2k, bittorrent, dc++, and other hashes
rahash2	block based hashing utility

Binary Information

Command	Description
file	determine file type
mimetype	identify file types
mimeopen	open files by mimetype
mediainfo	display information about audio/video files
rifle	ranger's file opener with special file type checking
extract	determine meta-information about a file
od	dump files in octal and other formats
xxd	make a hexdump or do the reverse (patch)
hexdump	ascii, decimal, hexadecimal, octal dump
mcview	midnight commander internal file viewer (ascii/hex)
dhex	hex editor with a diff mode
hexedit	view and edit files in hexadecimal or in ascii
tweak	efficient hex editor
hte	executable's editor
bsdiff	generate a patch between two binary files
bspatch	apply a patch built with bsdiff
rafind2	find byte patterns into files
rahash2	block based hashing utility
radiff2	unified binary diffing utility
hexdiff	hexadecimal visual diff for binary files
bbe	sed-like editor for binary files
dd	convert/copy a file, write disk headers, boot records
ddrescue	data recovery tool
foremost	recover files using their headers/footers/structures

File Managers

Command	Description
mc	midnight commander, visual shell for unix-like systems
gitfm	gnu interactive tools file manager
ranger	visual file manager
vifm	a ncurses based file manager with vi like keybindings
clex	file manager
vfu	text-mode file manager for unix/linux
pilot	simple file browser in the style of the alpine composer

Viewers

Command	Description
mcview	midnight commander internal file viewer (ascii/hex)
gitview	an ascii/hex file viewer (gnu interactive tools)
cat	concatenate files and print on the standard output
mad	append files by wildcard patterns
tac	concatenate and print files in reverse
rev	reverse characters of lines in file or files
spc	colorizes text for terminals and html (supercat)
lolcat	rainbow coloring for text
tac	concatenate and print files in reverse
combine	combine lines from two files using boolean operations
lnav	ncurses-based log file viewer
ccze	a robust log colorizer
zcat	expand and concatenate data (gz)
bzcat	decompresses files to stdout (bz2)
xzcat	decompresses files to stdout (xz, lzma)
less	opposite of more
zless	file perusal filter for crt viewing of compressed text
bzless	file perusal filter for crt viewing of bzip2
most	browse or page through a text file
more	file perusal filter for viewing
zmore	file perusal filter for crt viewing of compressed text
bzmore	file perusal filter for crt viewing of bzip2
pg	browse pagewise through text files

Editors

Command	Description
mcedit	internal file editor of gnu midnight commander
vi	text editor
vim	text editor
cream	set of macros making vim easier to use for beginners
emacs	gnu project emacs text editor
nano	a small and friendly text editor
jed	programmers editor
aee	another easy editor
diakonos	a customizable, usable console-based text editor
pico	simple text editor in the style of the alpine composer
zile	zile is lossy emacs

Text Utilities

Command	Description
truncate	shrink/extend the size of a file to the specified size
head	output the first 10 lines of file
tail	output the last 10 lines of file
multitail	browse through several files at once
since	display content of a file since the last time
split	split a file into fixed-size pieces
lxsplit	a simple tool for splitting and joining split files
nl	number lines of files
wc	print newline, word, and byte counts for each file
ex	text editor
ed	the standard text editor
red	line-oriented text editor
edbrowse	text editor and web browser
look	display lines beginning with a given string
grep	search files for lines of text matching a pattern
egrep	print lines matching a pattern (-e)
fgrep	search files for lines that match a fixed string (-f)
rgrep	print lines matching a pattern recursively (-r)
agrep	search a file for a string with approximate matching
sgrep	search a file for a structured pattern
zgrep	search compressed files for a regular expression
bzgrep	search bzip2 compressed files for a regular expression
ack	ack-grep is designed as a replacement for grep
ag	the silver searcher - like ack, but faster
urlview	url extractor/launcher (see urlscan for mails)
awk	pattern scanning and processing language
gawk	pattern scanning and processing language
mawk	pattern scanning and processing language
sed	stream editor for filtering and transforming text
psed	a stream editor
a2p	awk to perl translator
s2p	sed to perl translator
cut	extract columns from files
join	join lines of two files on a common field
combine	combine lines from two files using boolean operations
column	columnate lists
colrm	remove columns from a file
rs	reshape a data array
csplit	split a file into context-determined pieces
paste	append/merge columns
tr	translate, squeeze or delete characters
sort	sort lines of text files
msort	sort records in complex ways
tsort	perform topological sort
shuf	write a random permutation of the input lines to stdout
unsort	reorder lines in a file in semirandom ways
tac	concatenate and print files in reverse
rev	reverse characters of lines in file or files
uniq	report or omit repeated lines
tee	copy stdin to a file and to stdout simultaneously
multitee	send multiple inputs to multiple outputs
pr	convert text files for printing
fmt	optimally reformat text
par	filter for reformatting paragraphs
fold	wrap each input line to fit in specified width
expand	convert tabs to spaces
unexpand	convert spaces to tabs
uchardet	universalchardet (Universal Charset Detector)
recode	converts files between character sets
iconv	convert encoding of given files
unaccent	remove accents from input stream or a string
sq	squeeze a sorted word list
unsq	unsqueeze a sorted word list
csvtool	tool for performing manipulations on csv files
xmlstarlet	command line xml/xslt toolkit

Print

Command	Description
lp	send files to a printer
lpr	print files
lpq	show printer queue status
lpstat	print cups status information
lprm	remove print jobs
lpmove	move a job or all jobs to a new destination
cancel	cancel cups print jobs
lpc	line printer control program
ink	tool for checking the ink level of your printers
lpadmin	configure cups printers and classes
lpoptions	display or set cups printer options and defaults
cupsaccept	accept jobs sent to a destination
cupsreject	reject jobs sent to a destination
cupsdisable	stop printers and classes
cupsenable	start printers and classes
paperconfig	configure the system default paper size

Compression

Command	Description
dtrx	cleanly extract many archive types
atool	a script for managing file archives of various types
patool	portable archive file manager
gitunpack	gnu interactive tools - unified archive unpacking
ar	create, modify, and extract from archives
tar	the gnu version of the tar archiving utility
cpio	copy files to and from archives
7z	a file archiver with highest compression ratio
gzip	compress files (gnu zip)
pigz	parallel compress files (gnu zip)
bzip2	a block-sorting file compressor
lz	provides a listing of a tar.gz archive
gunzip	expand files (gnu zip)
unpigz	parallel decompress files (gnu zip)
bunzip2	a block-sorting file decompressor
gzexe	compress executable files in place
bzexe	compress executable files in place
compress	compress and expand data
pbzip2	parallel bzip2 file compressor
lzip	reduces the size of files
pax	portable archive interchange
rar	archive files with compression
unrar	extract files from rar archives
compress	compress data
uncompress	expand files
shar	create shell archives
unshar	unpack a shar file
unace	extract, test and view ace archives
uuencode	encode a binary file
uudecode	decode a file created by uuencode
base64	encode/decode data and print to standard output
xz	compress or decompress xz and lzma files
lzma	lzma compression and decompression tool
lzma2	lzma compression and decompression tool
zoo	manipulate archives of files in compressed form
pxz	parallel lzma compressor compatible with xz
zip	compress files (windows zip)
cabextract	extract files from microsoft cabinet (cab)
zrun	automatically uncompress arguments to command

Encryption

Command	Description
gpg	openpgp encryption and signing tool
gpgv	verify openpgp signatures
crypt	encrypt or decrypt files (wrapper for mcrypt)
mcrypt	encrypt files, several algorythms
bcrypt	blowfish file encryption
ccrypt	encrypt and decrypt using rijndael block cipher (aes)
scrypt	encrypt or decrypt files
aespipe	aes encrypting or decrypting pipe
openssl	openssl command line tool
enc	symmetric cipher routines
stunnel	universal ssl tunnel
cryptcat	twofish encryption enabled version of nc
rsyncrypto	rsync friendly encryption
encfs	mounts or creates an encrypted virtual filesystem
encfsctl	administrative tool for working with encfs filesystems
stegdetect	finds image files with steganographic content
stegbreak	launches brute-force dictionary attacks on jpg image
steghide	a steganography program

Backup

Command	Description
mt	control magnetic tape drive operation
dump	ext2/3/4 filesystem backup
restore	restore files or filesystem from backups made with dump
tar	read write tape archives
par2	par 2.0 compatible file verification and repair tool
unison	user level file-synchronization tool
rsync	a fast, versatile, remote (and local) file-copying tool
rsyncrypto	rsync friendly encryption
duplicity	encrypted incremental backup to local or remote storage
backup-manager	an easy to use backup tool for your linux box
rdist	remote file distribution client program
rdup	generate a file list suitable for making backups
tarsnap	manipulate remote encrypted backups
vbackup	a modular backup program
venti	client for sha1-addressed block storage server
bbackupctl	control the box backup client daemon

CD/DVD/BluRay

Command	Description
mkisofs	create an hybrid iso9660 joliet hfs filesystem
genisoimage	create iso9660/joliet/hfs filesystem
growisofs	combined frontend to cd/dvd/bluray recording program
cdw	frontend to cdrecord/mkisofs/growisofs and other tools
cdrdao	reads and writes cds in disc-at-once mode
cdrecord	burn a cd
xorriso	creates and manipulates iso filesystem with rockridge
bchunk	cd image format conversion from bin/cue to iso/cdr
burn	record from various sources to optical media (cd, dvd)
mp3burn	burn audio cds from mp3, ogg vorbis, or flac files
bashburn	a bash script cd burner writer
mybashburn	burn data cds/dvds and create mp3/ogg/flac
dvdauthor	assembles multiple mpeg into a suitable dvd filesystem
cdparanoia	cdda reading tool with extra data verification features
abcde	a better cd encoder, grabs cd to ogg/speex/mp3/flac/etc
crip	a terminal-based ripper/encoder/tagger tool
jack	rip and encode cds with one command
cdda2ogg	extract audio cd audio tracks and encode them in ogg
cdda2mp3	extract audio cd audio tracks and encode them in mp3
ripit	make flac/ogg/mp3/m4a/aac/als/mp4/mpc/wv/etc from cd
ocp	open cubic music player
cdcd	command driven cd player
cplay	a front-end for various audio players
mcdp	a small cdplayer for linux
workbone	interactive text-mode program for playing audio cd
cdctrl	command line cdrom control
cdeject	ejects the current compact disc
cdclose	closes the cdrom tray
cdir	lists infos about the currently loaded audio cd
cdinfo	print out the audiostatus (playing, etc)
cdpause	pauses/resumes the currently playing compact disc
cdplay	plays the compact disc
cdstop	stops the compact disc
cdvolume	sets the output volume level of the cd player (0-255)
cdshuffle	plays the audio tracks on the disc in random order
cdadd	add information for a new cd to .cdtooldb
cdown	query cddb database for info on a disc

Numbers and Math

Command	Description
qalc	powerful and easy to use command line calculator
bc	an arbitrary precision calculator language
dc	an arbitrary precision calculator
calc	arbitrary precision calculator
mathomatic	a computer algebra system
wcalc	a natural-expression command-line calculator
numfmt	convert numbers from/to human-readable strings
rax2	convert between (signed) int, float, oct, bin and hex
units	convert units from one scale to another
numgrep	the numeric equivilent of the grep utility
numprocess	this program mutates numbers as it encounters them
numsum	take the first numbers on stdin and return the sum
numaverage	find the average of a set of numbers
numbound	find boundary numbers in files or stdin
numnormalize	normalize a set of numbers, by default between 0 and 1
numinterval	show the numeric intervals between each line in a file
numround	rounds off numbers it encounters.
seq	print a sequence of numbers
numrange	print out a range of numbers for use in for loops
jot	print sequential or random data
ent	pseudorandom number sequence test
numrandom	print out a random number
factor	factor numbers
primes	display all primes (primes.pl)
primes.6	generate primes
sc	spreadsheet calculator
gnuplot	an interactive plotting program
maxima	common lisp version of macsyma symbolic mathematics
octave	matlab like language for numerical computations
R	a language for data analysis and graphics

Date and Time

Command	Description
date	print or set the system date and time
cal	displays a calendar and the date of easter
ncal	cal with an alternative layout
gcal	a program for calculating and printing calendars
gcalcli	google calendar command line interface
ddate	convert gregorian dates to discordian dates
pcal	generate postscript or html calendars
saydate	audio date/uptime check
saytime	audio time check

Schedule

Command	Description
sleep	wait for some time
watch	execute a program periodically, showing output
chronic	runs a command quietly unless it fails
wait	await process completion
flock	manage locks from shell scripts
lckdo	run a program with a lock held
shush	run a command and optionally report its output by mail
inotifywait	wait for changes to files using inotify
entr	run arbitrary commands when files change
fsniper	watch directories and apply rules to created files
timeout	run a command with a time limit
crontab	maintain crontab files for individual users
at	executes commands at a specified time
atq	lists the user pending jobs
atrm	remove jobs fom the later execution queue
batch	executes commands when system load levels permit

Office

Command	Description
wordgrinder	console-based word processor
antiword	show the text and images of ms word documents
abook	text-based address book program
hnb	hierarchical notebook
worklog	keeping track of time spent on different projects
tpp	text presentation program
xsw	slide show presentation tool
ledger	command-line accounting
sc	spreadsheet calculator
slsc	s-langauge port of the sc spreadsheet
teapot	table editor and planner
oleo	the gnu spreadsheet program
ssconvert	a command line spreadsheet format converter
ssindex	generate index data for spreadsheet files
ssgrep	search spreadsheets for strings
ssdiff	compare two spreadsheets
dbview	view dbase 3 files
gv	postscript and pdf viewer
xdvi	dvi previewer for the x window system

For note-taking, you might also want to have a look at:

• org-mode
• vimoutliner

Spelling

Command	Description
spell	check spelling in batch
aspell	check spelling interactively
ispell	check spelling in batch or interactively
goldendict	a feature-rich dictionary lookup program
dict	dict protocol client
sdcv	console version of stardict program
aiksaurus	english-language thesaurus
wtf	translates acronyms for you
an	anagram generator
wordplay	anagram finder

Publishing

Command	Description
gs	ghostscript, a postscript and pdf interpreter/previewer
fbgs	postscript/pdf viewer for the framebuffer console
latex	structured text formatting and typesetting
tex	text formatting and typesetting
etex	extended tex
latexdiff	determine and markup differences between two latex files
latexmk	generate latex document
dblatex	convert docbook to latex, dvi, postscript, and pdf
psselect	select pages from a postscript file
mf	metafont, a language for font and logo design
pdftex	pdf output from tex
mutool	all purpose tool for dealing with pdf files
pdfjam	a shell script for manipulating pdf files
pdftk	a handy tool for manipulating pdf
pdfunite	pdf page merger
pdffonts	pdf font analyzer
pdfimages	pdf image extractor
pdfinfo	pdf document information extractor
pdfseparate	pdf page extractor
pdftocairo	pdf to png/jpeg/pdf/ps/eps/svg using cairo
pdftohtml	program to convert pdf files into html, xml and png
pdftoppm	pdf to portable pixmap (ppm) converter
pdftops	pdf to postscript converter
pdftotext	pdf to text converter
diffpdf	compare two pdf files textually or visually

Task Managers

Command	Description
task	taskwarrior, a command line todo manager
tudu	command line hierarchical todo list
remind	a sophisticated reminder service
wyrd	front-end to remind
gcalcli	google calendar command line interface
calcurse	text-based organizer
pal	calendar with events
when	a minimalistic personal calendar program
devtodo	a reminder/task program aimed at developers
tdl	to do list manager
todo.sh	minimal, todo.txt focused task manager
w2do	a simple text-based todo manager
yokadi	commandline todo system
episoder	tv show reminder from epguides.com and thetvdb.com

Conversion

Command	Description
dos2unix	dos/mac to unix text file format converter
isutf8	check whether files are valid utf-8
iconv	convert encoding of given files
recode	converts files between character sets
utf8tolatin1	reads utf-8 encoded text and writes latin1
groff	front-end for the groff document formatting system
troff	the troff processor of the groff text formatting system
nroff	emulate nroff command with groff
deroff	remove roff and preprocessor constructs
eqn	format equations for troff or mathml
neqn	format equations for ascii output
tbl	format tables for troff
col	filter reverse line feeds from input
catdvi	dvi to plain text converter
gv	postscript and pdf viewer
odt2txt	a simple converter from opendocument text to plain text
o3read	dump of an openoffice.org document parse tree
o3tohtml	convert files in openoffice.org format to html
o3totxt	convert files in openoffice.org format to text
catdoc	outputs word doc file content as plain text
docx2txt	convert microsoft ooxml files to plain text
abiword	flexible word processor documents converter
antiword	show the text and images of ms word documents
xls2csv	output ms-excel file as comma-separated values
xlsx2csv	convert xslx xml files to csv format
xlhtml	convert excel xls files to html
ssconvert	spreadsheet format converter (gnumeric)
ppthtml	convert powerpoint ppt files to html
stx2any	converter from structured text to multiple formats
pandoc	general markup converter
unhtml	strip the html formatting
html2text	an advanced html-to-text converter
html2markdown	converts html to markdown-formatted text
asciidoc	converts an asciidoc text file to html or docbook
markdown	convert markdown syntax to (x)html
ttm	tex/latex to mathml converter
txt2tags	text formatting and conversion tool
txt2man	convert flat ascii text to man page format
txt2html	convert plain text file to html
textfmt	convert ascii text to postscript for facsimile
txt2pdbdoc	text to doc file converter for palm pilots
img2txt	convert images to various text-based coloured files
cacaview	ascii image browser
asciiview	a high quality ascii art image viewer
gnuhtml2latex	html to latex converter
csv2latex	convert a csv file into a latex document
sgml2latex	create latex, dvi, ps or pdf output from an sgml file
chm2pdf	a tool convert chm to pdf format
unoconv	convert documents from/to libreoffice format
jodconverter	import/export documents using the libreoffice filters
ps2ascii	ghostscript translator from postscript or pdf to ascii
ps2pdf	convert postscript to pdf using ghostscript
vilistextum	html to ascii converter
wvWare	convert msword documents
rst2pdf	convert restructuredtext documents to pdf

ASCII Art

Command	Description
figlet	display text with an ascii art charset
toilet	display large colourful characters
cowsay	configurable speaking/thinking cow (and a bit more)
cadubi	creative ascii drawing utility
lolcat	rainbow coloring for text
cacaview	ascii image browser
asciiview	a high quality ascii art image viewer
linux_logo	color ansi penguin logo with system information
screenfetch	the bash screenshot information tool

Images

Command	Description
fbi	framebuffer imageviewer
fim	fbi (linux framebuffer imageviewer) improved
findimagedupes	finds visually similar or duplicate images
identify	describes the format and characteristics of images
fbgrab	takes a screenshot using the framebuffer device
gifsicle	manipulates gif images and animations
pngcrush	optimizes, or modifies, png files
optipng	advanced optimization program for
gm	graphicsmagick is a set of tools to manipulate images
convert	convert/resize/blur/crop/despeckle/dither/etc image
mogrify	inplace convert/edit/resize/blur/crop/etc an image
icotool	convert and create win32 icon and cursor files
rdjpgcom	display text comments from a jpeg file
wrjpgcom	insert text comments into a jpeg file
cjpeg	compress an image file to a jpeg file
djpeg	decompress a jpeg file to an image file
jpegtran	lossless transformation of jpeg files
jp2a	convert jpeg images to ascii
exif	shows exif information in jpeg files
exiftool	read and write meta information in media files
exiftran	transform/rotate digital camera jpeg images
exifcom	set/display user comment tag contained in a jpeg exif
exiftags	output the properties contained in a jpeg exif section
exiftime	display/adjust the date and time exif tags
exifprobe	probe and report exif structure and metadata content
exifgrep	select and reformat the output of exifprobe
jhead	digicam jpeg exif header manipulation tool
gle	graphics layout engine
simple-scan	scanning utility
scanimage	scan an image
gocr	command line text recognition tool
tesseract	command-line ocr engine
album	themable html photo album generator
gphotofs	filesystem to mount digital cameras
qrencode	encode data in a qr code as a png or eps image

Vector Graphics

Command	Description
dot	filter for drawing directed graphs
neato	filter for drawing undirected graphs
twopi	filter for radial layouts of graphs
circo	filter for circular layout of graphs
fdp	filter for drawing undirected graphs
sfdp	filter for drawing large undirected graphs
patchwork	filter for tree maps
asy	asymptote: a script-based vector graphics language
inkscape	svg (scalable vector graphics) editing program
rasterizer	svg conversion to png, jpeg and pdf
potrace	transform bitmaps into vector graphics

3D

Command	Description
aqsis	aqsis renderer adhering to the renderman standard
povray	the persistence of vision ray tracer

Videos

Command	Description
mplayer	video/audio player/streamer
mencoder	video decoding, encoding and filtering tool
vlc	video lan client, a media player/streamer/transcoder
xine	a free video player
xine-remote	a small tool to connect xine remote control server
avplay	avplay media player
avconv	avconv video converter
avprobe	avprobe media prober
avidemux	a free video editor
mpgtx	manipulate mpeg files
mplex	mpeg 1/2 program/system stream multiplexer
ffmpeg	ffmpeg video converter
mediainfo	display information about audio/video files
imdb	calls any of the imdb functions
imdb-get	looks up imdb data for a film
imdb-link	links films based on their genre
imdb-rename	renames files based on their title
imdb-fxd	creates fxd files from the imdb cache for freevo
imdb-update-cache	updates the imdb cache for a given directory

Audio and Music

Command	Description
mplayer	video/audio player/streamer
vlc	video lan client, a media player/streamer/transcoder
sox	the swiss army knife of audio manipulation
oggenc	encode audio into the ogg vorbis format
flac	encoding, decoding, testing and analyzing flac streams
lame	create mp3 audio files
mediainfo	display information about audio/video files
exfalso	tag editor for mp3/ogg/flac/musepack/wavpack/mod/xm/it
id3	id3 tag editor
id3v2	add/change/remove/view id3v2 tags, converts/lists id3v1
id3tool	a command line editor for id3 tags
id3ed	edit id3 description tags in mpeg3 files
mussort	sort music files into folders

Audio Players

Command	Description
mplayer	video/audio player/streamer
vlc	video lan client, a media player/streamer/transcoder
ocp	open cubic music player
mpc	program for controlling music player daemon (mpd)
ncmpc	curses music player daemon (mpd) client
audtty	control audacious from cli with a ncurses interface
xmms2	command-line interface to the xmms2 daemon
cmus	curse music player
moosic	a command-line client for the moosic jukebox system
play	sox invoked as play outputs to the default sound device
bplay	buffered sound playing
ogg123	plays ogg vorbis files
mpg123	play audio mpeg 1.0/2.0/2.5 stream (layers 1, 2 and 3)
mpg321	simple and lightweight command line mp3 player
splay	mpeg-1,2 audio layer 1,2,3 file player
madplay	decode and play mpeg audio stream(s)
audiopreview	play audio, video, and internet media streams
herrie	interactive music playlist player
mp3blaster	an interactive text-console based mp3 player
mocp	console audio player
mpc123	your handy musepack audio player
orpheus	text mode menu and window-driven audio player
pytone	music jukebox for your audio files
yauap	audio player based on the gstreamer framework
mikmod	play soundtracker modules on a unix machine
xmp	extended module player
cdcd	command driven cd player
cplay	a front-end for various audio players
mcdp	a small cdplayer for linux
workbone	interactive text-mode program for playing audio cd
shell-fm	console-based player for last.fm radio streams

Audio Editing

Command	Description
sox	the swiss army knife of audio manipulation
ecasound	sample editor, multitrack recorder, fx-processor, etc
rec	sox invoked as rec set default sound device as input
brec	buffered sound recording
snd	a sound editor
gramofile	sample and process analog recordings
quelcom	command line editing tools for mp3 and wav files
qmp3check	check and clean mp3 streams
qmp3cut	extract, delete parts of a mp3 file
cutmp3	a fast and leightweight mp3 editor
fadecut	rip audiostreams, cut, fade in/out and tag audiofiles
qmp3info	show info from mp3 files
arename	automatically rename audio files by tagging information
qmp3join	join mp3 files
qmp3report	report mp3 files and directories
qwavinfo	show info from wav files
qwavjoin	join wav files
qwavcut	extract, delete parts of a wav file
qwavsilence	detect and shrink silence sequences in wav files
qwavfade	fade in/out wav files
qwavheaderdump	dump and fix wav headers
normalize-audio	adjusts volume levels of audio files

Midi

Command	Description
timidity	midi-to-wave converter and player
pmidi	midi file player for alsa
playmidi	full-featured midi player using the voxware driver
arecordmidi	record standard midi files
abc2midi	converts abc file to midi
midi2abc	program to convert midi format files to abc notation
abcm2ps	translate abc music notation to postscript or svg

Text to Speech

Command	Description
espeak	a multi-lingual software speech synthesizer
festival	a text-to-speech system
saydate	audio date/uptime check
saytime	audio time check

Games

Command	Description
adventure	an exploration game
nethack	exploring the mazes of menace
slashem	exploring the mazes of menace
rogue	exploring the dungeons of doom
crawl	the roguelike game of crawl
battlestar	a tropical adventure game
phantasia	an interterminal fantasy game
wump	hunt the wumpus in an underground cave
bastet	tetris(r) clone with "bastard" block-choosing ai
pytris	two players console tetris game
tetris-bsd	the game of tetris
greed	eat a game field until you run out of moves
moon-buggy	drive some car across the moon
ninvaders	ncurses version of space invaders
overkill	bloody 2d action deathmatch-like game in ascii-art
worm	play the growing worm game
snake	display chase game
atc	air traffic controller game
robots	fight off villainous robots
hunt	a multi-player multi-terminal game
wargames	shall we play a game?
canfield	the solitaire card game canfield
cribbage	the card game cribbage
mille	play mille bornes
monop	monopoly game
backgammon	the game of backgammon
sail	multi-user wooden ships and iron men
trek	trekkie game
boggle	word search game
hangman	computer version of the game hangman
gtypist	typing tutor for different keyboards and languages
arithmetic	quiz on simple arithmetic
quiz	random knowledge tests
fortune	print a random, hopefully interesting, adage
display-dhammapada	display a verse from the dhammapada

Screensavers

Command	Description
cmatrix	simulates the display from the matrix movie
rain	animated raindrops display
tty-clock	a terminal digital clock
binclock	prints time in binary format

Other

Command	Description
echo	display a line of text
printf	format and print data
getopt	parse command options
expect	automate applications accessed over a terminal
expr	evaluate expressions
yes	output a string repeatedly until killed
true	do nothing, successfully
false	do nothing, unsuccessfully
ifetch	image collection tool for ip cameras of ifetch-tools
rig	random identity generator
pwgen	generate pronounceable passwords
makepasswd	generate and/or encrypt passwords
pwsafe	password database utility
gringotts	secure password and data storage manager
clamscan	scan files and directories for viruses
llines	lifelines genealogy program, gedcom format

X Windows

Command	Description
xinput	utility to configure and test x input devices
xvidtune	adjust x server origin and size
xcalib	tiny monitor calibration loader for x
xev	x event viewer
setxkbmap	set the keyboard using the x keyboard extension
xmodmap	set/modify keymaps and pointer button mappings in x
xhost	server access control program for x
xsetroot	root window parameter setting utility for x
import	window/screenshot
xset	user preference utility for x
xrdb	x server resource database utility
appres	list x application resource database
listres	list resources in widgets
editres	a dynamic resource editor for x toolkit applications
xlsfonts	server font list displayer for x
xfontsel	point and click selection of x11 font names
xfd	display all the characters in an x font
fc-scan	scan font files or directories
fc-cache	build font information cache files
fc-cat	read font information cache files
fc-list	list available fonts
fc-query	query font files
fc-match	match available fonts
fc-pattern	parse and show pattern
mimeopen	open files by mimetype
xdg-open	opens a file or url in the user preferred application
exo-open	open urls and launch preferred applications (xfce)
gnome-open	open files and urls using the gnome file handlers
dmenu	dynamic menu, manages huge numbers defined menu items
notify-send	a program to send desktop notifications
xmessage	display a message/query in a window (x-based /bin/echo)
dialog	display curses dialog boxes from shell scripts
kdialog	show kde dialog boxes from shell scripts
zenity	display gtk+ dialogs
osd_cat	x on-screen file displayer
xclip	command line interface to x selections (clipboard)
xclipboard	x clipboard client
devilspie	perform actions on windows as they are created
xdotool	command-line x11 automation tool
xnee	records, replays x11 data on multiple displays
xbindkeys	grab key and mouse events in x and starts shell commands
xte	generates fake input using the xtest extension
x2x	use keyboard and mouse from an x display on antoher x
wmctrl	interact with a ewmh/netwm compatible x window manager
xtrlock	lock X display until password supplied
dbus-send	send a message to a desktop bus
dbus-monitor	debug probe to print desktop bus messages
qdbus	a communication-interface for qt-based applications
xrandr	primitive command line interface to randr extension
xprop	property displayer for x
xdpyinfo	display information utility for x
xwininfo	window information utility for x
xdriinfo	query configuration information of dri drivers
xvinfo	print out x-video extension adaptor information
glxinfo	show information about the glx implementation
Xvfb	virtual framebuffer x server without the hardware
trash	trash utility compliant with freedesktop.org
trash-list	list trashed files
trash-restore	restore for command line trash utility
trash-empty	empty for command line trash utility
xmag	magnify parts of the screen

Funny

Command	Description
axe	tools to improve network performance via snip
baby	create new process from two parents
bosskill	send a signal to your boss, or terminate your boss
c	genericised softdrink generator (coffee, coke etc)
celibacy	don't have sex
chainsaw	tools to improve network performance via snip
chastise	library function to punish users
condom	protects against viruses and child processes
ctluser	control lusers
cutter	tools to improve network performance via snip
egrope	massage a file for a while
fgrope	massage a file for a while
flame	reply to usenet news posting automatically
flog	speed up a process
gong	evaluate process performance
grope	massage a file for a while
guru	system administration
knife	tools to improve network performance via snip
lart	luser attitude readjustment tool
luser	process to control the clueless individuals
normality	defines types of normality different users may have
nuke	launch nuclear weapons at mapped usenet sites
party	set os responses mode
people	fetch a list of all ttys behaving like a human
pmsd	periodically manic system daemon
rescrog	change something, make it different
rtfm	a response for easy questions from clueless lusers
sex	have sex
slave	a semi-interactive command for the dirty work
strfry	string operation
sysadmin	responsible for everything imaginable
think	you dont have to think, computers can think for you
tm	meditate
uubp	unix-to-unix beer protocol
whack	mangle requests to a printer or damage a printer
xkill	kill processes or users, including usenet poster
xlart	interactive x interface to rlart

---

cliref.yaml

---
categories:
  order:
    - Content
    - Other Documentation
    - Getting Help
    - Interesting Pages
    - Shells
    - Terminal Tools
    - Setup
    - System
    - Kernel
    - Init and Runlevels
    - Hardware
    - Filesystem Tools
    - Quota
    - Processes
    - Performances
    - User Management
    - User Information
    - Environment
    - Security Context
    - Development
    - Debugging
    - Revision Control
    - Database
    - Network
    - Wireless
    - Network Monitor
    - Network Tunnels
    - Network Scan
    - Network Capture
    - Network Filesystems
    - Network Apps
    - Modem/Fax/GSM
    - Network File Transfer
    - Browser
    - RSS Reader
    - Podcast
    - Chat
    - EMail
    - Newsgroups
    - Websites
    - Directories
    - Files
    - Pipes
    - File Attributes
    - File Find
    - File Compare
    - Binary Information
    - File Managers
    - Viewers
    - Editors
    - Text Utilities
    - Print
    - Compression
    - Encryption
    - Backup
    - CD/DVD/BluRay
    - Numbers and Math
    - Date and Time
    - Schedule
    - Office
    - Spelling
    - Publishing
    - Task Managers
    - Conversion
    - ASCII Art
    - Images
    - Vector Graphics
    - 3D
    - Videos
    - Audio and Music
    - Audio Players
    - Audio Editing
    - Midi
    - Text to Speech
    - Games
    - Screensavers
    - Other
    - X Windows
    - Funny
  titles:
    3D:
      - aqsis
      - povray
    ASCII Art:
      - figlet
      - toilet
      - cowsay
      - cadubi
      - lolcat
      - cacaview
      - asciiview
      - linux_logo
      - screenfetch
    Audio Editing:
      - sox
      - ecasound
      - rec
      - brec
      - snd
      - gramofile
      - quelcom
      - qmp3check
      - qmp3cut
      - cutmp3
      - fadecut
      - qmp3info
      - arename
      - qmp3join
      - qmp3report
      - qwavinfo
      - qwavjoin
      - qwavcut
      - qwavsilence
      - qwavfade
      - qwavheaderdump
      - normalize-audio
    Audio Players:
      - mplayer
      - vlc
      - ocp
      - mpc
      - ncmpc
      - audtty
      - xmms2
      - cmus
      - moosic
      - play
      - bplay
      - ogg123
      - mpg123
      - mpg321
      - splay
      - madplay
      - audiopreview
      - herrie
      - mp3blaster
      - mocp
      - mpc123
      - orpheus
      - pytone
      - yauap
      - mikmod
      - xmp
      - cdcd
      - cplay
      - mcdp
      - workbone
      - shell-fm
    Audio and Music:
      - mplayer
      - vlc
      - sox
      - oggenc
      - flac
      - lame
      - mediainfo
      - exfalso
      - id3
      - id3v2
      - id3tool
      - id3ed
      - mussort
    Backup:
      - mt
      - dump
      - restore
      - tar
      - par2
      - unison
      - rsync
      - rsyncrypto
      - duplicity
      - backup-manager
      - rdist
      - rdup
      - tarsnap
      - vbackup
      - venti
      - bbackupctl
    Binary Information:
      - file
      - mimetype
      - mimeopen
      - mediainfo
      - rifle
      - extract
      - od
      - xxd
      - hexdump
      - mcview
      - dhex
      - hexedit
      - tweak
      - hte
      - bsdiff
      - bspatch
      - rafind2
      - rahash2
      - radiff2
      - hexdiff
      - bbe
      - dd
      - ddrescue
      - foremost
    Browser:
      - lynx
      - links
      - links2
      - elinks
      - netrik
      - w3m
      - edbrowse
      - httrack
      - surfraw
      - gopher
    CD/DVD/BluRay:
      - mkisofs
      - genisoimage
      - growisofs
      - cdw
      - cdrdao
      - cdrecord
      - xorriso
      - bchunk
      - burn
      - mp3burn
      - bashburn
      - mybashburn
      - dvdauthor
      - cdparanoia
      - abcde
      - crip
      - jack
      - cdda2ogg
      - cdda2mp3
      - ripit
      - ocp
      - cdcd
      - cplay
      - mcdp
      - workbone
      - cdctrl
      - cdeject
      - cdclose
      - cdir
      - cdinfo
      - cdpause
      - cdplay
      - cdstop
      - cdvolume
      - cdshuffle
      - cdadd
      - cdown
    Chat:
      - centerim
      - finch
      - pork
      - freetalk
      - mcabber
      - ekg
      - BitchX
      - irssi
      - weechat
      - bitlbee
      - epic5
      - tinyirc
      - ii
      - sic
      - tircd
      - talk
      - ytalk
      - write
      - wall
      - mesg
    Compression:
      - dtrx
      - atool
      - patool
      - gitunpack
      - ar
      - tar
      - cpio
      - 7z
      - gzip
      - pigz
      - bzip2
      - lz
      - gunzip
      - unpigz
      - bunzip2
      - gzexe
      - bzexe
      - compress
      - pbzip2
      - lzip
      - pax
      - rar
      - unrar
      - compress
      - uncompress
      - shar
      - unshar
      - unace
      - uuencode
      - uudecode
      - base64
      - xz
      - lzma
      - lzma2
      - zoo
      - pxz
      - zip
      - cabextract
      - zrun
    Conversion:
      - dos2unix
      - isutf8
      - iconv
      - recode
      - utf8tolatin1
      - groff
      - troff
      - nroff
      - deroff
      - eqn
      - neqn
      - tbl
      - col
      - catdvi
      - gv
      - odt2txt
      - o3read
      - o3tohtml
      - o3totxt
      - catdoc
      - docx2txt
      - abiword
      - antiword
      - xls2csv
      - xlsx2csv
      - xlhtml
      - ssconvert
      - ppthtml
      - stx2any
      - pandoc
      - unhtml
      - html2text
      - html2markdown
      - asciidoc
      - markdown
      - ttm
      - txt2tags
      - txt2man
      - txt2html
      - textfmt
      - txt2pdbdoc
      - img2txt
      - cacaview
      - asciiview
      - gnuhtml2latex
      - csv2latex
      - sgml2latex
      - chm2pdf
      - unoconv
      - jodconverter
      - ps2ascii
      - ps2pdf
      - vilistextum
      - wvWare
      - rst2pdf
    Database:
      - sqlite3
      - sqlite
      - psql
      - mysql
      - sql
      - rrdtool
    Date and Time:
      - date
      - cal
      - ncal
      - gcal
      - gcalcli
      - ddate
      - pcal
      - saydate
      - saytime
    Debugging:
      - gdb
      - r2
      - elfsh
      - e2dbg
      - readelf
      - rabin2
      - objdump
      - objcopy
      - nm
      - lsof
      - lslk
      - fuser
      - trace-cmd
      - trace-cmd-list
      - pstack
      - dtrace
      - sysdig
      - etrace
      - eresi
      - errno
      - explain
      - strace
      - ltrace
      - mtrace
      - xtrace
      - stap
      - ktap
      - llttng
      - perf
      - perf-stat
      - perf-list
      - tiptop
      - babeltrace
      - memdump
      - scanmem
      - crash
      - binwalk
      - strings
      - ident
      - pmap
      - ldd
      - ldconfig
      - ld.so
      - /lib/ld-linux.so.2
      - /lib64/ld-linux-x86-64.so.2
    Development:
      - perl
      - perldoc
      - perltidy
      - perlcritic
      - perlbug
      - cpan
      - txt2regex
      - ruby
      - irb
      - gem
      - python
      - pydoc
      - pycompile
      - pychecker
      - ghc
      - ghci
      - lua
      - luac
      - luadoc
      - luarocks
      - node
      - js_beautify
      - jq
      - jsoncat
      - jsonlint
      - java
      - javac
      - javadoc
      - jardiff
      - php
      - clisp
      - fort77
      - f2c
      - fc
      - nasm
      - yasm
      - as
      - rasm2
      - gcc
      - gprof
      - ld
      - c99
      - cpp
      - make
      - dmake
      - cmake
      - cxref
      - ctags
      - cflow
      - cscope
      - sloccount
      - cloc
      - pepper
      - astyle
      - indent
      - bcpp
      - uncrustify
      - xmlstarlet
      - xmllint
      - xgrep
      - xmlcatalog
      - xalan
      - xmlindent
      - tidy
      - csstidy
      - highlight
      - lex
      - strip
      - m4
      - yacc
      - flex
      - gencat
      - getconf
      - errno
      - explain
    Directories:
      - cd
      - pwd
      - mkdir
      - rmdir
      - tree
      - dirdiff
      - pushd
      - popd
      - dirs
    EMail:
      - mail
      - mailx
      - msmtp
      - mutt
      - alpine
      - notmuch
      - cone
      - elmo
      - fetchyahoo
      - urlscan
    Editors:
      - mcedit
      - vi
      - vim
      - cream
      - emacs
      - nano
      - jed
      - aee
      - diakonos
      - pico
      - zile
    Encryption:
      - gpg
      - gpgv
      - crypt
      - mcrypt
      - bcrypt
      - ccrypt
      - scrypt
      - aespipe
      - openssl
      - enc
      - stunnel
      - cryptcat
      - rsyncrypto
      - encfs
      - encfsctl
      - stegdetect
      - stegbreak
      - steghide
    Environment:
      - printenv
      - env
      - locale
      - localedef
    File Attributes:
      - umask
      - stat
      - touch
      - chown
      - chgrp
      - chmod
      - chattr
      - lsattr
      - getfattr
      - setfattr
      - getfacl
      - setfacl
      - test
    File Compare:
      - diff
      - zdiff
      - bzdiff
      - diff3
      - diffstat
      - rfcdiff
      - merge
      - wdiff
      - sdiff
      - mcdiff
      - ndiff
      - bsdiff
      - rdiff
      - quilt
      - bspatch
      - patch
      - unify
      - combine
      - comm
      - cmp
      - zcmp
      - bzcmp
      - cksum
      - sum
      - md5sum
      - md5pass
      - shasum
      - rhash
      - rahash2
    File Find:
      - find
      - ftff
      - updatedb
      - locate
      - doodle
      - which
      - whereis
      - fdupes
      - rdfind
      - findimagedupes
      - hardlink
    File Managers:
      - mc
      - gitfm
      - ranger
      - vifm
      - clex
      - vfu
      - pilot
    Files:
      - ls
      - dir
      - vdir
      - tree
      - dircolors
      - df
      - dfc
      - pydf
      - du
      - ncdu
      - agedu
      - touch
      - fallocate
      - truncate
      - dd
      - cp
      - mcp
      - qcp
      - install
      - mv
      - mmv
      - rename
      - prename
      - qmv
      - convmv
      - vidir
      - detox
      - rm
      - unlink
      - shred
      - wipe
      - gitwipe
      - ln
      - mln
      - sln
      - link
      - readlink
      - cleanlinks
      - hardlink
      - stow
      - mkfifo
      - mknod
      - mktemp
      - flock
      - basename
      - dirname
      - realpath
      - pathchk
      - inotifywatch
      - inotifywait
      - trash
      - trash-list
      - trash-restore
      - trash-empty
    Filesystem Tools:
      - df
      - discus
      - mount
      - umount
      - mhddfs
      - fusermount
      - findmnt
      - mountpoint
      - sync
      - mkfs
      - tune2fs
      - fsck
      - badblocks
      - debugfs
      - fdisk
      - cfdisk
      - parted
      - fdformat
      - mtools
      - lilo
      - grub
      - dd
      - ddrescue
      - dcfldd
      - foremost
      - photorec
      - safecopy
    Funny:
      - axe
      - baby
      - bosskill
      - c
      - celibacy
      - chainsaw
      - chastise
      - condom
      - ctluser
      - cutter
      - egrope
      - fgrope
      - flame
      - flog
      - gong
      - grope
      - guru
      - knife
      - lart
      - luser
      - normality
      - nuke
      - party
      - people
      - pmsd
      - rescrog
      - rtfm
      - sex
      - slave
      - strfry
      - sysadmin
      - think
      - tm
      - uubp
      - whack
      - xkill
      - xlart
    Games:
      - adventure
      - nethack
      - slashem
      - rogue
      - crawl
      - battlestar
      - phantasia
      - wump
      - bastet
      - pytris
      - tetris-bsd
      - greed
      - moon-buggy
      - ninvaders
      - overkill
      - worm
      - snake
      - atc
      - robots
      - hunt
      - wargames
      - canfield
      - cribbage
      - mille
      - monop
      - backgammon
      - sail
      - trek
      - boggle
      - hangman
      - gtypist
      - arithmetic
      - quiz
      - fortune
      - display-dhammapada
    Getting Help:
      - man
      - apropos
      - whatis
      - whichman
      - info
      - help
      - debmany
      - debian-reference
      - type
      - konqueror
      - popbugs
    Hardware:
      - x86info
      - dmesg
      - hdparm
      - smartctl
      - badblocks
      - setserial
      - wvdial
      - lshw
      - lshal
      - lsdev
      - lsblk
      - lsusb
      - lspci
      - setpci
      - pnpdump
      - isadump
      - scsiinfo
      - sginfo
      - sg_map
      - udevadm
      - ethtool
      - mii-tool
      - dmidecode
      - hwinfo
      - acpitool
      - apm
      - alsamixer
      - aumix
      - pactl
      - rexima
      - alsactl
      - showkey
      - loadkeys
      - dumpkeys
      - setleds
      - imvirt
    Images:
      - fbi
      - fim
      - findimagedupes
      - identify
      - fbgrab
      - gifsicle
      - pngcrush
      - optipng
      - gm
      - convert
      - mogrify
      - icotool
      - rdjpgcom
      - wrjpgcom
      - cjpeg
      - djpeg
      - jpegtran
      - jp2a
      - exif
      - exiftool
      - exiftran
      - exifcom
      - exiftags
      - exiftime
      - exifprobe
      - exifgrep
      - jhead
      - gle
      - simple-scan
      - scanimage
      - gocr
      - tesseract
      - album
      - gphotofs
      - qrencode
    Init and Runlevels:
      - initctl
      - start
      - stop
      - status
      - chkconfig
      - service
      - sysv-rc-conf
      - runlevel
      - telinit
      - checkrestart
      - systemctl
      - journalctl
      - loginctl
      - halt
      - reboot
      - shutdown
      - poweroff
    Interesting Pages:
      - intro.1
      - intro.2
      - intro.3
      - intro.4
      - intro.5
      - intro.6
      - intro.7
      - intro.8
      - undocumented.7
      - missing
      - LDP
      - man-pages
      - environ
      - hier
      - file-hierarchy
      - capabilities
      - signal
      - standards
      - units.7
      - libc
      - posixoptions
      - errno
      - errno.3
      - undocumented.3
      - printf
      - strftime
      - acl
      - ascii
      - ascii.7
      - unicode
      - locale.7
      - readline
      - terminfo
      - bash
      - zsh
      - glob
      - regex
      - pcrepattern
      - pcresyntax
      - perlintro
      - perlcheat
      - gittutorial
      - random
    Kernel:
      - lsmod
      - insmod
      - rmmod
      - modinfo
      - modprobe
      - modconf
      - depmod
      - sysctl
    Midi:
      - timidity
      - pmidi
      - playmidi
      - arecordmidi
      - abc2midi
      - midi2abc
      - abcm2ps
    Modem/Fax/GSM:
      - minicom
      - efax
      - mgetty
      - fax
      - sendfax
      - sendpage
      - faxstat
      - faxspool
      - faxq
      - faxrunq
      - faxrm
      - faxalter
      - fax2ps
      - faxcover
      - faxmail
      - textfmt
      - gammu
    Network:
      - ip
      - tc
      - ifconfig
      - ifdata
      - ifstat
      - ifdown
      - ifup
      - ethtool
      - mii-tool
      - nmcli
      - nmtui
      - nm-tool
      - iperf
      - nuttcp
      - pchar
      - route
      - hostname
      - domainname
      - dnsdomainname
      - nisdomainname
      - ypdomainname
      - whois
      - dnstracer
      - ping
      - hping3
      - traceroute
      - tracepath
      - mtr
      - netstat
      - lsof
      - ss
      - host
      - dig
      - nslookup
      - zonecheck
      - nc
      - cryptcat
      - ncat
      - socat
      - faucet
      - hose
      - arping
      - arp
      - arpwatch
      - arpspoof
      - rarp
      - ufw
      - iptables
      - ip6tables
      - iptables-save
      - ip6tables-save
      - iptables-restore
      - ip6tables-restore
      - iptstate
      - ipchains
      - ipcalc
      - ipv6calc
      - sipcalc
      - subnetcalc
      - tcpkill
      - tcpnice
      - sshow
      - sshmitm
      - smbclient
      - ntptrace
      - snmpget
      - snmpwalk
      - snmpcmd
      - lldpad
      - lldptool
      - suricata
    Network Apps:
      - ssh
      - cssh
      - ssh-copy-id
      - ssh-keygen
      - rsh
      - crsh
      - rlogin
      - telnet
      - ctel
      - ccon
      - uux
      - uustat
      - finger
    Network Capture:
      - wireshark
      - tshark
      - scapy
      - dumpcap
      - tcpspy
      - tcpdump
      - tcptrace
      - tcpick
      - tcpflow
      - snort
      - pcapdump
      - pcapip
      - pcappick
      - pcapuc
      - ettercap
      - ngrep
      - tetheral
      - sniffit
      - httpry
      - dsniff
      - kismet
    Network File Transfer:
      - curl
      - wget
      - httrack
      - linkchecker
      - woof
      - wput
      - sftp
      - ncftp
      - ncftpget
      - ncftpput
      - ftp
      - lftp
      - scp
      - rcp
      - uucp
      - mulk
      - axel
      - aria
      - aria2c
      - ctorrent
      - rtorrent
      - mktorrent
      - bittorrent-downloader
      - btdownloadcurses
      - amulecmd
      - get_flash_videos
      - rmtpdump
      - youtube-dl
      - quvi
      - cclive
      - nc
      - cryptcat
      - ncat
      - socat
      - faucet
      - hose
      - trickle
    Network Filesystems:
      - exportfs
      - showmount
      - nfsstat
      - nfsiostat
      - sshfs
      - curlftpfs
      - flickrfs
    Network Monitor:
      - ntop
      - ntopng
      - nload
      - cbm
      - sntop
      - iftop
      - jnettop
      - bmon
      - bwn-ng
      - speedometer
      - netload
      - nethogs
      - slurm
      - vnstat
      - nicstat
      - pktstat
      - iptraf
      - netwatch
      - trafshow
      - tcptrack
      - tcpreen
      - wavemon
    Network Scan:
      - nmap
      - ndiff
      - scapy
      - nping
      - arp-scan
      - sslscan
      - xprobe2
      - p0f
    Network Tunnels:
      - ip
      - ip-tunnel
      - stunnel
      - ptunnel
      - udptunnel
    Newsgroups:
      - slrn
      - trn
      - tin
      - nn
    Numbers and Math:
      - qalc
      - bc
      - dc
      - calc
      - mathomatic
      - wcalc
      - numfmt
      - rax2
      - units
      - numgrep
      - numprocess
      - numsum
      - numaverage
      - numbound
      - numnormalize
      - numinterval
      - numround
      - seq
      - numrange
      - jot
      - ent
      - numrandom
      - factor
      - primes
      - primes.6
      - sc
      - gnuplot
      - maxima
      - octave
      - R
    Office:
      - wordgrinder
      - antiword
      - abook
      - hnb
      - worklog
      - tpp
      - xsw
      - ledger
      - sc
      - slsc
      - teapot
      - oleo
      - ssconvert
      - ssindex
      - ssgrep
      - ssdiff
      - dbview
      - gv
      - xdvi
    Other:
      - echo
      - printf
      - getopt
      - expect
      - expr
      - yes
      - true
      - false
      - ifetch
      - rig
      - pwgen
      - makepasswd
      - pwsafe
      - gringotts
      - clamscan
      - llines
    Performances:
      - collectl
      - glances
      - uptime
      - mpstat
      - lmbench
      - sysbench
      - sar
      - free
      - swapon
      - vmstat
      - dstat
      - iostat
      - iotop
      - fio
      - blktrace
      - slabtop
      - sysctl
      - hdparm
      - ps
      - top
      - htop
      - pidstat
      - nice
      - renice
      - ionice
      - taskset
      - sysdig
      - ltrace
      - strace
      - errno
      - explain
      - stap
      - ktap
      - llttng
      - perf
      - tiptop
      - ethtool
      - iperf
      - pchar
      - ping
      - hping3
      - traceroute
      - mtr
      - nicstat
      - netstat
      - ss
      - socklist
      - sockstat
      - iptraf
      - tcpdump
      - darkstat
      - justniffer
      - snmpget
      - lldptool
      - tune2fs
      - dd
      - siege
      - tsung
    Pipes:
      - tee
      - multitee
      - pee
      - xargs
      - parallel
      - mispipe
      - pv
      - sponge
      - stdbuf
      - ifne
      - ts
      - vipe
    Podcast:
      - hpodder
      - podget
      - podracer
    Print:
      - lp
      - lpr
      - lpq
      - lpstat
      - lprm
      - lpmove
      - cancel
      - lpc
      - ink
      - lpadmin
      - lpoptions
      - cupsaccept
      - cupsreject
      - cupsdisable
      - cupsenable
      - paperconfig
    Processes:
      - ps
      - w
      - top
      - htop
      - atop
      - gitps
      - glances
      - pidstat
      - powertop
      - prtstat
      - pstree
      - whowatch
      - kill
      - killall
      - pidof
      - pkill
      - pgrep
      - skill
      - snice
      - nice
      - renice
      - ionice
      - cpulimit
      - taskset
      - setuid
      - setsid
      - nohup
      - disown
      - jobs
      - bg
      - fg
      - time
      - timeout
      - uux
      - uustat
      - ipcs
      - ipcrm
    Publishing:
      - gs
      - fbgs
      - latex
      - tex
      - etex
      - latexdiff
      - latexmk
      - dblatex
      - psselect
      - mf
      - pdftex
      - mutool
      - pdfjam
      - pdftk
      - pdfunite
      - pdffonts
      - pdfimages
      - pdfinfo
      - pdfseparate
      - pdftocairo
      - pdftohtml
      - pdftoppm
      - pdftops
      - pdftotext
      - diffpdf
    Quota:
      - quota
      - repquota
      - setquota
      - edquota
      - quotaon
      - quotaoff
      - quotacheck
      - convertquota
    RSS Reader:
      - newsbeuter
      - rsstail
      - canto
      - raggle
      - olive
      - rawdog
      - nrss
      - snownews
    Revision Control:
      - rcs
      - ci
      - co
      - git
      - tig
      - bzr
      - cvs
      - darcs
      - hg
      - svn
    Schedule:
      - sleep
      - watch
      - chronic
      - wait
      - flock
      - lckdo
      - shush
      - inotifywait
      - entr
      - fsniper
      - timeout
      - crontab
      - at
      - atq
      - atrm
      - batch
    Screensavers:
      - cmatrix
      - rain
      - tty-clock
      - binclock
    Security Context:
      - su
      - sudo
      - sudoedit
      - op
      - runcon
      - chcon
      - chroot
      - schroot
      - rarun2
    Setup:
      - apt-get
      - apt-config
      - apt-cache
      - apt-file
      - dlocate
      - whohas
      - apt-mark
      - debfoster
      - deborphan
      - dgrep
      - dglob
      - dpigs
      - popularity-contest
      - popcon-largest-unused
      - popbugs
      - which-pkg-broke
      - dpkg
      - dpkg-reconfigure
      - debconf
      - debconf-get-selections
      - debconf-set-selections
      - update-alternatives
      - update-manager
      - dselect
      - aptitude
      - synaptic
      - alien
      - smart
      - yum
      - rpm
      - urpmi
      - zypper
      - pacman
      - yaourt
      - stow
      - checkrestart
    Shells:
      - sh
      - bash
      - fish
      - zsh
      - fizsh
      - ksh
      - pdksh
      - mksh
      - csh
      - tcsh
      - ash
      - dash
      - rc
      - git-sh
      - shellcheck
    Spelling:
      - spell
      - aspell
      - ispell
      - goldendict
      - dict
      - sdcv
      - aiksaurus
      - wtf
      - an
      - wordplay
    System:
      - inxi
      - nmon
      - collectl
      - binstats
      - uptime
      - times
      - lsb_release
      - uname
      - arch
      - nproc
      - procinfo
      - mpstat
      - saidar
      - perf-top
      - lmbench
      - sysbench
      - sar
      - hostid
      - free
      - swapon
      - swapoff
      - vmstat
      - dstat
      - iostat
      - iotop
      - fio
      - blktrace
      - blockdev
      - slabtop
      - tload
      - logger
      - logwatch
      - swatch
      - imvirt
    Task Managers:
      - task
      - tudu
      - remind
      - wyrd
      - gcalcli
      - calcurse
      - pal
      - when
      - devtodo
      - tdl
      - todo.sh
      - w2do
      - yokadi
      - episoder
    Terminal Tools:
      - screen
      - tmux
      - byobu
      - dvtm
      - twin
      - dtach
      - reptyr
      - kibitz
      - script
      - scriptreplay
      - ttyrec
      - ttyplay
      - clear
      - reset
      - openvt
      - chvt
      - deallocvt
      - tty
      - stty
      - tabs
      - setterm
      - tput
      - tic
      - toe
      - infocmp
      - captoinfo
      - infotocap
    Text Utilities:
      - truncate
      - head
      - tail
      - multitail
      - since
      - split
      - lxsplit
      - nl
      - wc
      - ex
      - ed
      - red
      - edbrowse
      - look
      - grep
      - egrep
      - fgrep
      - rgrep
      - agrep
      - sgrep
      - zgrep
      - bzgrep
      - ack
      - ag
      - urlview
      - awk
      - gawk
      - mawk
      - sed
      - psed
      - a2p
      - s2p
      - cut
      - join
      - combine
      - column
      - colrm
      - rs
      - csplit
      - paste
      - tr
      - sort
      - msort
      - tsort
      - shuf
      - unsort
      - tac
      - rev
      - uniq
      - tee
      - multitee
      - pr
      - fmt
      - par
      - fold
      - expand
      - unexpand
      - uchardet
      - recode
      - iconv
      - unaccent
      - sq
      - unsq
      - csvtool
      - xmlstarlet
    Text to Speech:
      - espeak
      - festival
      - saydate
      - saytime
    User Information:
      - id
      - groups
      - sa
      - ac
      - who
      - whowatch
      - whoami
      - rwho
      - w
      - last
      - lastb
      - lastlog
      - lastcomm
      - users
      - logname
      - talk
      - ytalk
      - write
      - wall
      - mesg
    User Management:
      - adduser
      - useradd
      - userdel
      - usermod
      - newusers
      - groupadd
      - groupdel
      - groupmod
      - newgrp
      - chage
      - chfn
      - chsh
      - passwd
    Vector Graphics:
      - dot
      - neato
      - twopi
      - circo
      - fdp
      - sfdp
      - patchwork
      - asy
      - inkscape
      - rasterizer
      - potrace
    Videos:
      - mplayer
      - mencoder
      - vlc
      - xine
      - xine-remote
      - avplay
      - avconv
      - avprobe
      - avidemux
      - mpgtx
      - mplex
      - ffmpeg
      - mediainfo
      - imdb
      - imdb-get
      - imdb-link
      - imdb-rename
      - imdb-fxd
      - imdb-update-cache
    Viewers:
      - mcview
      - gitview
      - cat
      - mad
      - tac
      - rev
      - spc
      - lolcat
      - tac
      - combine
      - lnav
      - ccze
      - zcat
      - bzcat
      - xzcat
      - less
      - zless
      - bzless
      - most
      - more
      - zmore
      - bzmore
      - pg
    Websites:
      - shell-fm
      - google
      - gcalcli
      - episoder
      - youtube-dl
      - get_flash_videos
      - quvi
      - cclive
      - twyt
      - bti
      - tircd
      - twidge
      - weather
    Wireless:
      - iw
      - iwconfig
      - iwlist
      - iwevent
      - iwgetid
      - wavemon
      - kismet
    X Windows:
      - xinput
      - xvidtune
      - xcalib
      - xev
      - setxkbmap
      - xmodmap
      - xhost
      - xsetroot
      - import
      - xset
      - xrdb
      - appres
      - listres
      - editres
      - xlsfonts
      - xfontsel
      - xfd
      - fc-scan
      - fc-cache
      - fc-cat
      - fc-list
      - fc-query
      - fc-match
      - fc-pattern
      - mimeopen
      - xdg-open
      - exo-open
      - gnome-open
      - dmenu
      - notify-send
      - xmessage
      - dialog
      - kdialog
      - zenity
      - osd_cat
      - xclip
      - xclipboard
      - devilspie
      - xdotool
      - xnee
      - xbindkeys
      - xte
      - x2x
      - wmctrl
      - xtrlock
      - dbus-send
      - dbus-monitor
      - qdbus
      - xrandr
      - xprop
      - xdpyinfo
      - xwininfo
      - xdriinfo
      - xvinfo
      - glxinfo
      - Xvfb
      - trash
      - trash-list
      - trash-restore
      - trash-empty
      - xmag
commands:
  /lib/ld-linux.so.2:
    categories:
      - Debugging
    description: dynamic linker-loader
    section: 8
  /lib64/ld-linux-x86-64.so.2:
    categories:
      - Debugging
    description: dynamic linker-loader
    section: 8
  7z:
    categories:
      - Compression
    description: a file archiver with highest compression ratio
    section: 1
  BitchX:
    categories:
      - Chat
    description: an advanced internet relay chat client
    section: 1
  LDP:
    categories:
      - Interesting Pages
    description: linux documentation project with help and guides
    section: 7
  R:
    categories:
      - Numbers and Math
    description: a language for data analysis and graphics
    section: 1
  Xvfb:
    categories:
      - X Windows
    description: virtual framebuffer x server without the hardware
    section: 1
  a2p:
    categories:
      - Text Utilities
    description: awk to perl translator
    section: 1
  abc2midi:
    categories:
      - Midi
    description: converts abc file to midi
    section: 1
  abcde:
    categories:
      - CD/DVD/BluRay
    description: 'a better cd encoder, grabs cd to ogg/speex/mp3/flac/etc'
    section: 1
  abcm2ps:
    categories:
      - Midi
    description: translate abc music notation to postscript or svg
    section: 1
  abiword:
    categories:
      - Conversion
    description: flexible word processor documents converter
    section: 1
  abook:
    categories:
      - Office
    description: text-based address book program
    section: 1
  ac:
    categories:
      - User Information
    description: print statistics about users connect time
    section: 1
  ack:
    categories:
      - Text Utilities
    description: ack-grep is designed as a replacement for grep
    section: 1p
  acl:
    categories:
      - Interesting Pages
    description: access control lists
    section: 5
  acpitool:
    categories:
      - Hardware
    description: 'acpi client, allowing you to query or set acpi values'
    section: 1
  adduser:
    categories:
      - User Management
    description: add a user or group to the system
    section: 8
  adventure:
    categories:
      - Games
    description: an exploration game
    section: 6
  aee:
    categories:
      - Editors
    description: another easy editor
    section: 1
  aespipe:
    categories:
      - Encryption
    description: aes encrypting or decrypting pipe
    section: 1
  ag:
    categories:
      - Text Utilities
    description: 'the silver searcher - like ack, but faster'
    section: 1
  agedu:
    categories:
      - Files
    description: correlate disk usage and last-access times
    section: 1
  agrep:
    categories:
      - Text Utilities
    description: search a file for a string with approximate matching
    section: 1
  aiksaurus:
    categories:
      - Spelling
    description: english-language thesaurus
    section: 1
  album:
    categories:
      - Images
    description: themable html photo album generator
    section: 1
  alien:
    categories:
      - Setup
    description: 'convert or install an alien binary package (rpm, deb)'
    section: 1p
  alpine:
    categories:
      - EMail
    description: internet news and email
    section: 1
  alsactl:
    categories:
      - Hardware
    description: advanced controls for alsa soundcard driver
    section: 1
  alsamixer:
    categories:
      - Hardware
    description: soundcard mixer for alsa driver
    section: 1
  amulecmd:
    categories:
      - Network File Transfer
    description: console-based program to control amule
    section: 1
  an:
    categories:
      - Spelling
    description: anagram generator
    section: 6
  antiword:
    categories:
      - Office
      - Conversion
    description: show the text and images of ms word documents
    section: 1
  apm:
    categories:
      - Hardware
    description: interface with the apm subsystem
    section: 1
  appres:
    categories:
      - X Windows
    description: list x application resource database
    section: 1
  apropos:
    categories:
      - Getting Help
    description: search the manual page names and descriptions
    section: 1
  apt-cache:
    categories:
      - Setup
    description: query the apt cache
    section: 8
  apt-config:
    categories:
      - Setup
    description: apt configuration query program
    section: 8
  apt-file:
    categories:
      - Setup
    description: apt package searching utility
    section: 1
  apt-get:
    categories:
      - Setup
    description: apt package handling utility (debian)
    section: 8
  apt-mark:
    categories:
      - Setup
    description: mark/unmark a package as being automatically-installed
    section: 8
  aptitude:
    categories:
      - Setup
    description: high-level interface to the package manager
    section: 8
  aqsis:
    categories:
      - 3D
    description: aqsis renderer adhering to the renderman standard
    section: 1
  ar:
    categories:
      - Compression
    description: 'create, modify, and extract from archives'
    section: 1
  arch:
    categories:
      - System
    description: print machine hardware name (same as uname -m)
    section: 1
  arecordmidi:
    categories:
      - Midi
    description: record standard midi files
    section: 1
  arename:
    categories:
      - Audio Editing
    description: automatically rename audio files by tagging information
    section: 1
  aria:
    categories:
      - Network File Transfer
    description: 'fast download utility (http, ftp, bittorrent, metalink)'
    section: 1
  aria2c:
    categories:
      - Network File Transfer
    description: the ultra fast download utility http/ftp/bt/metalink
    section: 1
  arithmetic:
    categories:
      - Games
    description: quiz on simple arithmetic
    section: 6
  arp:
    categories:
      - Network
    description: manipulate the system arp cache
    section: 8
  arp-scan:
    categories:
      - Network Scan
    description: the arp scanner
    section: 1
  arping:
    categories:
      - Network
    description: arp find out ethernet address by first arping then arp
    section: 8
  arpspoof:
    categories:
      - Network
    description: intercept packets on a switched lan
    section: 8
  arpwatch:
    categories:
      - Network
    description: keep track of ethernet/ip address pairings
    section: 8
  as:
    categories:
      - Development
    description: the portable gnu assembler
    section: 1
  ascii:
    categories:
      - Interesting Pages
    description: report character aliases
    section: 1
  ascii.7:
    categories:
      - Interesting Pages
    description: 'ascii characters in octal, decimal, and hexadecimal'
    section: 7
  asciidoc:
    categories:
      - Conversion
    description: converts an asciidoc text file to html or docbook
    section: 1
  asciiview:
    categories:
      - Conversion
      - ASCII Art
    description: a high quality ascii art image viewer
    section: 1
  ash:
    categories:
      - Shells
    description: the almquist shell
    section: 1
  aspell:
    categories:
      - Spelling
    description: check spelling interactively
    section: 1
  astyle:
    categories:
      - Development
    description: 'indentation and reformatting filters c, c++, c#, java'
    section: 1
  asy:
    categories:
      - Vector Graphics
    description: 'asymptote: a script-based vector graphics language'
    section: 1
  at:
    categories:
      - Schedule
    description: executes commands at a specified time
    section: 1
  atc:
    categories:
      - Games
    description: air traffic controller game
    section: 6
  atool:
    categories:
      - Compression
    description: a script for managing file archives of various types
    section: 1
  atop:
    categories:
      - Processes
    description: at computing system & process monitor
    section: 1
  atq:
    categories:
      - Schedule
    description: lists the user pending jobs
    section: 1
  atrm:
    categories:
      - Schedule
    description: remove jobs fom the later execution queue
    section: 1
  audiopreview:
    categories:
      - Audio Players
    description: 'play audio, video, and internet media streams'
    section: 1
  audtty:
    categories:
      - Audio Players
    description: control audacious from cli with a ncurses interface
    section: 1
  aumix:
    categories:
      - Hardware
    description: adjust audio mixer
    section: 1
  avconv:
    categories:
      - Videos
    description: avconv video converter
    section: 1
  avidemux:
    categories:
      - Videos
    description: a free video editor
    section: 1
  avplay:
    categories:
      - Videos
    description: avplay media player
    section: 1
  avprobe:
    categories:
      - Videos
    description: avprobe media prober
    section: 1
  awk:
    categories:
      - Text Utilities
    description: pattern scanning and processing language
    section: 1
  axe:
    categories:
      - Funny
    description: tools to improve network performance via snip
    section: 8fun
  axel:
    categories:
      - Network File Transfer
    description: light download accelerator (best imo)
    section: 1
  babeltrace:
    categories:
      - Debugging
    description: babeltrace trace viewer and converter for (ctf)
    section: 1
  baby:
    categories:
      - Funny
    description: create new process from two parents
    section: 1fun
  backgammon:
    categories:
      - Games
    description: the game of backgammon
    section: 6
  backup-manager:
    categories:
      - Backup
    description: an easy to use backup tool for your linux box
    section: 8
  badblocks:
    categories:
      - Hardware
      - Filesystem Tools
    description: search a device for bad blocks
    section: 8
  base64:
    categories:
      - Compression
    description: encode/decode data and print to standard output
    section: 1
  basename:
    categories:
      - Files
    description: strip directory and suffix from filenames
    section: 1
  bash:
    categories:
      - Interesting Pages
      - Shells
    description: gnu bourne-again shell
    section: 1
  bashburn:
    categories:
      - CD/DVD/BluRay
    description: a bash script cd burner writer
    section: 1
  bastet:
    categories:
      - Games
    description: tetris(r) clone with "bastard" block-choosing ai
    section: 6
  batch:
    categories:
      - Schedule
    description: executes commands when system load levels permit
    section: 1
  battlestar:
    categories:
      - Games
    description: a tropical adventure game
    section: 6
  bbackupctl:
    categories:
      - Backup
    description: control the box backup client daemon
    section: 8
  bbe:
    categories:
      - Binary Information
    description: sed-like editor for binary files
    section: 1
  bc:
    categories:
      - Numbers and Math
    description: an arbitrary precision calculator language
    section: 1
  bchunk:
    categories:
      - CD/DVD/BluRay
    description: cd image format conversion from bin/cue to iso/cdr
    section: 1
  bcpp:
    categories:
      - Development
    description: make c++ beautifier
    section: 1
  bcrypt:
    categories:
      - Encryption
    description: blowfish file encryption
    section: 1
  bg:
    categories:
      - Processes
    description: 'lists stopped or background jobs, resume a stopped job'
    section: 1
  binclock:
    categories:
      - Screensavers
    description: prints time in binary format
    section: 1
  binstats:
    categories:
      - System
    description: display statistics about programs and libraries
    section: 1
  binwalk:
    categories:
      - Debugging
    description: binary image search tool
    section: 1
  bitlbee:
    categories:
      - Chat
    description: irc gateway to im chat networks
    section: 8
  bittorrent-downloader:
    categories:
      - Network File Transfer
    description: download files using a scatter-gather network
    section: 1
  blktrace:
    categories:
      - System
      - Performances
    description: generate traces of the i/o traffic on block devices
    section: 8
  blockdev:
    categories:
      - System
    description: call block device ioctls from the command line
    section: 8
  bmon:
    categories:
      - Network Monitor
    description: bandwidth monitor and rate estimator
    section: 8
  boggle:
    categories:
      - Games
    description: word search game
    section: 6
  bosskill:
    categories:
      - Funny
    description: 'send a signal to your boss, or terminate your boss'
    section: 8fun
  bplay:
    categories:
      - Audio Players
    description: buffered sound playing
    section: 1
  brec:
    categories:
      - Audio Editing
    description: buffered sound recording
    section: 1
  bsdiff:
    categories:
      - File Compare
      - Binary Information
    description: generate a patch between two binary files
    section: 1
  bspatch:
    categories:
      - File Compare
      - Binary Information
    description: apply a patch built with bsdiff
    section: 1
  btdownloadcurses:
    categories:
      - Network File Transfer
    description: download files using a scatter-gather network
    section: 1
  bti:
    categories:
      - Websites
    description: send a tweet to twitter.com from the command line
    section: 1
  bunzip2:
    categories:
      - Compression
    description: a block-sorting file decompressor
    section: 1
  burn:
    categories:
      - CD/DVD/BluRay
    description: 'record from various sources to optical media (cd, dvd)'
    section: 1
  bwn-ng:
    categories:
      - Network Monitor
    description: a live monitor for network and disk io
    section: 1
  byobu:
    categories:
      - Terminal Tools
    description: wrapper script for seeding configuration to screen/tmux
    section: 1
  bzcat:
    categories:
      - Viewers
    description: decompresses files to stdout (bz2)
    section: 1
  bzcmp:
    categories:
      - File Compare
    description: compare compressed files
    section: 1
  bzdiff:
    categories:
      - File Compare
    description: compare compressed files
    section: 1
  bzexe:
    categories:
      - Compression
    description: compress executable files in place
    section: 1
  bzgrep:
    categories:
      - Text Utilities
    description: search bzip2 compressed files for a regular expression
    section: 1
  bzip2:
    categories:
      - Compression
    description: a block-sorting file compressor
    section: 1
  bzless:
    categories:
      - Viewers
    description: file perusal filter for crt viewing of bzip2
    section: 1
  bzmore:
    categories:
      - Viewers
    description: file perusal filter for crt viewing of bzip2
    section: 1
  bzr:
    categories:
      - Revision Control
    description: bazaar next-generation distributed version control
    section: 1
  c:
    categories:
      - Funny
    description: 'genericised softdrink generator (coffee, coke etc)'
    section: 1fun
  c99:
    categories:
      - Development
    description: compile standard ansi c programs
    section: 1
  cabextract:
    categories:
      - Compression
    description: extract files from microsoft cabinet (cab)
    section: 1
  cacaview:
    categories:
      - Conversion
      - ASCII Art
    description: ascii image browser
    section: 1
  cadubi:
    categories:
      - ASCII Art
    description: creative ascii drawing utility
    section: 1
  cal:
    categories:
      - Date and Time
    description: displays a calendar and the date of easter
    section: 1
  calc:
    categories:
      - Numbers and Math
    description: arbitrary precision calculator
    section: 1
  calcurse:
    categories:
      - Task Managers
    description: text-based organizer
    section: 1
  cancel:
    categories:
      - Print
    description: cancel cups print jobs
    section: 1
  canfield:
    categories:
      - Games
    description: the solitaire card game canfield
    section: 6
  canto:
    categories:
      - RSS Reader
    description: an ncurses rss reader
    section: 1
  capabilities:
    categories:
      - Interesting Pages
    description: overview of linux capabilities
    section: 7
  captoinfo:
    categories:
      - Terminal Tools
    description: convert a termcap description into terminfo description
    section: 1
  cat:
    categories:
      - Viewers
    description: concatenate files and print on the standard output
    section: 1
  catdoc:
    categories:
      - Conversion
    description: outputs word doc file content as plain text
    section: 1
  catdvi:
    categories:
      - Conversion
    description: dvi to plain text converter
    section: 1
  cbm:
    categories:
      - Network Monitor
    description: display the current traffic on all network devices
    section: 1
  cclive:
    categories:
      - Network File Transfer
      - Websites
    description: downloading media streams from youtube and similars
    section: 1
  ccon:
    categories:
      - Network Apps
    description: 'cluster admin tool, multiple console connection'
    section: 1
  ccrypt:
    categories:
      - Encryption
    description: encrypt and decrypt using rijndael block cipher (aes)
    section: 1
  ccze:
    categories:
      - Viewers
    description: a robust log colorizer
    section: 1
  cd:
    categories:
      - Directories
    description: change directory
    section: 1
  cdadd:
    categories:
      - CD/DVD/BluRay
    description: add information for a new cd to .cdtooldb
    section: 1
  cdcd:
    categories:
      - CD/DVD/BluRay
      - Audio Players
    description: command driven cd player
    section: 1
  cdclose:
    categories:
      - CD/DVD/BluRay
    description: closes the cdrom tray
    section: 1
  cdctrl:
    categories:
      - CD/DVD/BluRay
    description: command line cdrom control
    section: 1
  cdda2mp3:
    categories:
      - CD/DVD/BluRay
    description: extract audio cd audio tracks and encode them in mp3
    section: 1
  cdda2ogg:
    categories:
      - CD/DVD/BluRay
    description: extract audio cd audio tracks and encode them in ogg
    section: 1
  cdeject:
    categories:
      - CD/DVD/BluRay
    description: ejects the current compact disc
    section: 1
  cdinfo:
    categories:
      - CD/DVD/BluRay
    description: 'print out the audiostatus (playing, etc)'
    section: 1
  cdir:
    categories:
      - CD/DVD/BluRay
    description: lists infos about the currently loaded audio cd
    section: 1
  cdown:
    categories:
      - CD/DVD/BluRay
    description: query cddb database for info on a disc
    section: 1
  cdparanoia:
    categories:
      - CD/DVD/BluRay
    description: cdda reading tool with extra data verification features
    section: 1
  cdpause:
    categories:
      - CD/DVD/BluRay
    description: pauses/resumes the currently playing compact disc
    section: 1
  cdplay:
    categories:
      - CD/DVD/BluRay
    description: plays the compact disc
    section: 1
  cdrdao:
    categories:
      - CD/DVD/BluRay
    description: reads and writes cds in disc-at-once mode
    section: 1
  cdrecord:
    categories:
      - CD/DVD/BluRay
    description: burn a cd
    section: 1
  cdshuffle:
    categories:
      - CD/DVD/BluRay
    description: plays the audio tracks on the disc in random order
    section: 1
  cdstop:
    categories:
      - CD/DVD/BluRay
    description: stops the compact disc
    section: 1
  cdvolume:
    categories:
      - CD/DVD/BluRay
    description: sets the output volume level of the cd player (0-255)
    section: 1
  cdw:
    categories:
      - CD/DVD/BluRay
    description: frontend to cdrecord/mkisofs/growisofs and other tools
    section: 1
  celibacy:
    categories:
      - Funny
    description: don't have sex
    section: 1fun
  centerim:
    categories:
      - Chat
    description: text mode based im client for linux
    section: 1
  cfdisk:
    categories:
      - Filesystem Tools
    description: curses/slang based disk partition table manipulator
    section: 8
  cflow:
    categories:
      - Development
    description: generate a c-language flowgraph
    section: 1
  chage:
    categories:
      - User Management
    description: change user password expiry information
    section: 1
  chainsaw:
    categories:
      - Funny
    description: tools to improve network performance via snip
    section: 8fun
  chastise:
    categories:
      - Funny
    description: library function to punish users
    section: 3fun
  chattr:
    categories:
      - File Attributes
    description: change advanced file attributes on a linux file system
    section: 1
  chcon:
    categories:
      - Security Context
    description: change file security context (selinux)
    section: 1
  checkrestart:
    categories:
      - Setup
      - Init and Runlevels
    description: check which processes need a restart after an upgrade
    section: 1
  chfn:
    categories:
      - User Management
    description: change real user name and information
    section: 1
  chgrp:
    categories:
      - File Attributes
    description: change group ownership
    section: 1
  chkconfig:
    categories:
      - Init and Runlevels
    description: enable or disable system services
    section: 8
  chm2pdf:
    categories:
      - Conversion
    description: a tool convert chm to pdf format
    section: 1
  chmod:
    categories:
      - File Attributes
    description: change file mode bits
    section: 1
  chown:
    categories:
      - File Attributes
    description: change file owner and group
    section: 1
  chronic:
    categories:
      - Schedule
    description: runs a command quietly unless it fails
    section: 1
  chroot:
    categories:
      - Security Context
    description: run command or interactive shell with special root dir
    section: 8
  chsh:
    categories:
      - User Management
    description: change login shell
    section: 1
  chvt:
    categories:
      - Terminal Tools
    description: change foreground virtual terminal
    section: 1
  ci:
    categories:
      - Revision Control
    description: check in rcs revisions
    section: 1
  circo:
    categories:
      - Vector Graphics
    description: filter for circular layout of graphs
    section: 1
  cjpeg:
    categories:
      - Images
    description: compress an image file to a jpeg file
    section: 1
  cksum:
    categories:
      - File Compare
    description: checksum and count the bytes in a file
    section: 1
  clamscan:
    categories:
      - Other
    description: scan files and directories for viruses
    section: 1
  cleanlinks:
    categories:
      - Files
    description: remove dangling symbolic links and empty directories
    section: 1
  clear:
    categories:
      - Terminal Tools
    description: clear the screen
    section: 1
  clex:
    categories:
      - File Managers
    description: file manager
    section: 1
  clisp:
    categories:
      - Development
    description: 'ansi common lisp compiler, interpreter and debugger'
    section: 1
  cloc:
    categories:
      - Development
    description: count lines of source code and comments
    section: 1
  cmake:
    categories:
      - Development
    description: cross-platform makefile generator
    section: 1
  cmatrix:
    categories:
      - Screensavers
    description: simulates the display from the matrix movie
    section: 1
  cmp:
    categories:
      - File Compare
    description: compare two files byte by byte
    section: 1
  cmus:
    categories:
      - Audio Players
    description: curse music player
    section: 1
  co:
    categories:
      - Revision Control
    description: check out rcs revisions
    section: 1
  col:
    categories:
      - Conversion
    description: filter reverse line feeds from input
    section: 1
  collectl:
    categories:
      - System
      - Performances
    description: collects data that describes the current system status
    section: 1
  colrm:
    categories:
      - Text Utilities
    description: remove columns from a file
    section: 1
  column:
    categories:
      - Text Utilities
    description: columnate lists
    section: 1
  combine:
    categories:
      - File Compare
      - Viewers
      - Text Utilities
    description: combine lines from two files using boolean operations
    section: 1
  comm:
    categories:
      - File Compare
    description: compare two sorted files line by line
    section: 1
  compress:
    categories:
      - Compression
      - Compression
    description: compress data
    section: 1
  condom:
    categories:
      - Funny
    description: protects against viruses and child processes
    section: 1fun
  cone:
    categories:
      - EMail
    description: read and send e-mail messages
    section: 1
  convert:
    categories:
      - Images
    description: convert/resize/blur/crop/despeckle/dither/etc image
    section: 1
  convertquota:
    categories:
      - Quota
    description: convert quota from old file format to new one
    section: 8
  convmv:
    categories:
      - Files
    description: converts filenames from one encoding to another
    section: 1
  cowsay:
    categories:
      - ASCII Art
    description: configurable speaking/thinking cow (and a bit more)
    section: 1
  cp:
    categories:
      - Files
    description: copy files and directories
    section: 1
  cpan:
    categories:
      - Development
    description: easily interact with cpan from the command line
    section: 1
  cpio:
    categories:
      - Compression
    description: copy files to and from archives
    section: 1
  cplay:
    categories:
      - CD/DVD/BluRay
      - Audio Players
    description: a front-end for various audio players
    section: 1
  cpp:
    categories:
      - Development
    description: the c preprocessor
    section: 1
  cpulimit:
    categories:
      - Processes
    description: limits the cpu usage of a process
    section: 1
  crash:
    categories:
      - Debugging
    description: analyze linux crash dump data or a live system
    section: 8
  crawl:
    categories:
      - Games
    description: the roguelike game of crawl
    section: 6
  cream:
    categories:
      - Editors
    description: set of macros making vim easier to use for beginners
    section: 1
  cribbage:
    categories:
      - Games
    description: the card game cribbage
    section: 6
  crip:
    categories:
      - CD/DVD/BluRay
    description: a terminal-based ripper/encoder/tagger tool
    section: 1
  crontab:
    categories:
      - Schedule
    description: maintain crontab files for individual users
    section: 1
  crsh:
    categories:
      - Network Apps
    description: 'cluster admin tool, multiple rsh connection'
    section: 1
  crypt:
    categories:
      - Encryption
    description: encrypt or decrypt files (wrapper for mcrypt)
    section: 1
  cryptcat:
    categories:
      - Network
      - Network File Transfer
      - Encryption
    description: twofish encryption enabled version of nc
    section: 1
  cscope:
    categories:
      - Development
    description: interactively examine a c program
    section: 1
  csh:
    categories:
      - Shells
    description: a shell with c-like syntax
    section: 1
  csplit:
    categories:
      - Text Utilities
    description: split a file into context-determined pieces
    section: 1
  cssh:
    categories:
      - Network Apps
    description: 'cluster admin tool, multiple ssh connection'
    section: 1
  csstidy:
    categories:
      - Development
    description: css parser and optimiser
    section: 1
  csv2latex:
    categories:
      - Conversion
    description: convert a csv file into a latex document
    section: 1
  csvtool:
    categories:
      - Text Utilities
    description: tool for performing manipulations on csv files
    section: 1
  ctags:
    categories:
      - Development
    description: 'generate tag file for emacs, vi'
    section: 1
  ctel:
    categories:
      - Network Apps
    description: 'cluster admin tool, multiple telnet connection'
    section: 1
  ctluser:
    categories:
      - Funny
    description: control lusers
    section: 8fun
  ctorrent:
    categories:
      - Network File Transfer
    description: download bittorrent files from command line
    section: 1
  cupsaccept:
    categories:
      - Print
    description: accept jobs sent to a destination
    section: 8
  cupsdisable:
    categories:
      - Print
    description: stop printers and classes
    section: 8
  cupsenable:
    categories:
      - Print
    description: start printers and classes
    section: 8
  cupsreject:
    categories:
      - Print
    description: reject jobs sent to a destination
    section: 8
  curl:
    categories:
      - Network File Transfer
    description: transfer a url (swiss army tool)
    section: 1
  curlftpfs:
    categories:
      - Network Filesystems
    description: mount a ftp host as a local directory
    section: 1
  cut:
    categories:
      - Text Utilities
    description: extract columns from files
    section: 1
  cutmp3:
    categories:
      - Audio Editing
    description: a fast and leightweight mp3 editor
    section: 1
  cutter:
    categories:
      - Funny
    description: tools to improve network performance via snip
    section: 8fun
  cvs:
    categories:
      - Revision Control
    description: concurrent versions system
    section: 1
  cxref:
    categories:
      - Development
    description: generate a c-language program cross-reference table
    section: 1
  darcs:
    categories:
      - Revision Control
    description: an advanced revision control system
    section: 1
  darkstat:
    categories:
      - Performances
    description: network statistics gatherer
    section: 8
  dash:
    categories:
      - Shells
    description: the debian almquist shell
    section: 1
  date:
    categories:
      - Date and Time
    description: print or set the system date and time
    section: 1
  dblatex:
    categories:
      - Publishing
    description: 'convert docbook to latex, dvi, postscript, and pdf'
    section: 1
  dbus-monitor:
    categories:
      - X Windows
    description: debug probe to print desktop bus messages
    section: 1
  dbus-send:
    categories:
      - X Windows
    description: send a message to a desktop bus
    section: 1
  dbview:
    categories:
      - Office
    description: view dbase 3 files
    section: 1
  dc:
    categories:
      - Numbers and Math
    description: an arbitrary precision calculator
    section: 1
  dcfldd:
    categories:
      - Filesystem Tools
    description: enhanced version of dd for forensics and security
    section: 1
  dd:
    categories:
      - Filesystem Tools
      - Performances
      - Files
      - Binary Information
    description: 'convert/copy a file, write disk headers, boot records'
    section: 1
  ddate:
    categories:
      - Date and Time
    description: convert gregorian dates to discordian dates
    section: 1
  ddrescue:
    categories:
      - Filesystem Tools
      - Binary Information
    description: data recovery tool
    section: 1
  deallocvt:
    categories:
      - Terminal Tools
    description: deallocate unused virtual terminals
    section: 1
  debconf:
    categories:
      - Setup
    description: run a debconf-using program
    section: 1
  debconf-get-selections:
    categories:
      - Setup
    description: output contents of debconf database
    section: 1
  debconf-set-selections:
    categories:
      - Setup
    description: insert new values into the debconf database
    section: 1
  debfoster:
    categories:
      - Setup
    description: weed unnecessary debian packages
    section: 8
  debian-reference:
    categories:
      - Getting Help
    description: open the post-installation user's guide in browser
    section: 1
  debmany:
    categories:
      - Getting Help
    description: show documentation from installed packages
    section: 1
  deborphan:
    categories:
      - Setup
    description: orphaned package finder
    section: 1
  debugfs:
    categories:
      - Filesystem Tools
    description: ext2/ext3/ext4 file system debugger
    section: 8
  depmod:
    categories:
      - Kernel
    description: program to generate modules.dep and map files
    section: 8
  deroff:
    categories:
      - Conversion
    description: remove roff and preprocessor constructs
    section: 1
  detox:
    categories:
      - Files
    description: clean up filenames
    section: 1
  devilspie:
    categories:
      - X Windows
    description: perform actions on windows as they are created
    section: 1
  devtodo:
    categories:
      - Task Managers
    description: a reminder/task program aimed at developers
    section: 1
  df:
    categories:
      - Filesystem Tools
      - Files
    description: report file system disk space usage
    section: 1
  dfc:
    categories:
      - Files
    description: display file system space usage using graphs and colors
    section: 1
  dglob:
    categories:
      - Setup
    description: expand package names or files matching a pattern
    section: 1
  dgrep:
    categories:
      - Setup
    description: grep through files belonging to an installed package
    section: 1
  dhex:
    categories:
      - Binary Information
    description: hex editor with a diff mode
    section: 1
  diakonos:
    categories:
      - Editors
    description: 'a customizable, usable console-based text editor'
    section: 1
  dialog:
    categories:
      - X Windows
    description: display curses dialog boxes from shell scripts
    section: 1
  dict:
    categories:
      - Spelling
    description: dict protocol client
    section: 1
  diff:
    categories:
      - File Compare
    description: compare files line by line
    section: 1
  diff3:
    categories:
      - File Compare
    description: compare three files line by line
    section: 1
  diffpdf:
    categories:
      - Publishing
    description: compare two pdf files textually or visually
    section: 1
  diffstat:
    categories:
      - File Compare
    description: make histogram from diff-output
    section: 1
  dig:
    categories:
      - Network
    description: dns lookup utility
    section: 1
  dir:
    categories:
      - Files
    description: briefly list files
    section: 1
  dircolors:
    categories:
      - Files
    description: color setup for ls
    section: 1
  dirdiff:
    categories:
      - Directories
    description: display diff and merge changes between directories
    section: 1
  dirname:
    categories:
      - Files
    description: convert a full pathname to just a path
    section: 1
  dirs:
    categories:
      - Directories
    description: display directory stack (pushd/popd)
    section: 1
  discus:
    categories:
      - Filesystem Tools
    description: print a report of disk space usage
    section: 1
  disown:
    categories:
      - Processes
    description: 'shell built-in, removes each jobs from shell'
    section: 1
  display-dhammapada:
    categories:
      - Games
    description: display a verse from the dhammapada
    section: 1
  djpeg:
    categories:
      - Images
    description: decompress a jpeg file to an image file
    section: 1
  dlocate:
    categories:
      - Setup
    description: program to view debian package information
    section: 1
  dmake:
    categories:
      - Development
    description: 'maintain program groups, or interdependent files'
    section: 1
  dmenu:
    categories:
      - X Windows
    description: 'dynamic menu, manages huge numbers defined menu items'
    section: 1
  dmesg:
    categories:
      - Hardware
    description: print kernel and driver messages
    section: 1
  dmidecode:
    categories:
      - Hardware
    description: dmi table decoder
    section: 8
  dnsdomainname:
    categories:
      - Network
    description: show the system dns domain name
    section: 1
  dnstracer:
    categories:
      - Network
    description: trace a chain of dns servers to the source
    section: 8
  docx2txt:
    categories:
      - Conversion
    description: convert microsoft ooxml files to plain text
    section: 1
  domainname:
    categories:
      - Network
    description: show or set the system nis/yp domain name
    section: 1
  doodle:
    categories:
      - File Find
    description: a tool to search the meta-data in your files
    section: 1
  dos2unix:
    categories:
      - Conversion
    description: dos/mac to unix text file format converter
    section: 1
  dot:
    categories:
      - Vector Graphics
    description: filter for drawing directed graphs
    section: 1
  dpigs:
    categories:
      - Setup
    description: show which installed packages occupy the most space
    section: 1
  dpkg:
    categories:
      - Setup
    description: package manager for debian
    section: 1
  dpkg-reconfigure:
    categories:
      - Setup
    description: reconfigure an already installed package
    section: 8
  dselect:
    categories:
      - Setup
    description: debian package management frontend
    section: 1
  dsniff:
    categories:
      - Network Capture
    description: password sniffer (lots of protocols)
    section: 8
  dstat:
    categories:
      - System
      - Performances
    description: versatile tool for generating system resource stats
    section: 1
  dtach:
    categories:
      - Terminal Tools
    description: program that emulates the detach feature of screen
    section: 1
  dtrace:
    categories:
      - Debugging
    description: tune and troubleshoot programs and system (systemtap)
    section: 1
  dtrx:
    categories:
      - Compression
    description: cleanly extract many archive types
    section: 1
  du:
    categories:
      - Files
    description: estimate file space usage
    section: 1
  dump:
    categories:
      - Backup
    description: ext2/3/4 filesystem backup
    section: 8
  dumpcap:
    categories:
      - Network Capture
    description: dump network traffic
    section: 1
  dumpkeys:
    categories:
      - Hardware
    description: dump keyboard translation tables
    section: 1
  duplicity:
    categories:
      - Backup
    description: encrypted incremental backup to local or remote storage
    section: 1
  dvdauthor:
    categories:
      - CD/DVD/BluRay
    description: assembles multiple mpeg into a suitable dvd filesystem
    section: 1
  dvtm:
    categories:
      - Terminal Tools
    description: dynamic virtual terminal manager
    section: 1
  e2dbg:
    categories:
      - Debugging
    description: the embedded elf debugger
    section: 1
  ecasound:
    categories:
      - Audio Editing
    description: 'sample editor, multitrack recorder, fx-processor, etc'
    section: 1
  echo:
    categories:
      - Other
    description: display a line of text
    section: 1
  ed:
    categories:
      - Text Utilities
    description: the standard text editor
    section: 1
  edbrowse:
    categories:
      - Browser
      - Text Utilities
    description: text editor and web browser
    section: 1
  editres:
    categories:
      - X Windows
    description: a dynamic resource editor for x toolkit applications
    section: 1
  edquota:
    categories:
      - Quota
    description: edit user quotas
    section: 8
  efax:
    categories:
      - Modem/Fax/GSM
    description: 'send/receive faxes with class 1, 2 or 2.0 fax modem'
    section: 1
  egrep:
    categories:
      - Text Utilities
    description: print lines matching a pattern (-e)
    section: 1
  egrope:
    categories:
      - Funny
    description: massage a file for a while
    section: 1fun
  ekg:
    categories:
      - Chat
    description: gadu-gadu compatible client
    section: 1
  elfsh:
    categories:
      - Debugging
    description: the elsf shell
    section: 1
  elinks:
    categories:
      - Browser
    description: lynx-like alternative character mode www browser
    section: 1
  elmo:
    categories:
      - EMail
    description: the electronic mail operator
    section: 1
  emacs:
    categories:
      - Editors
    description: gnu project emacs text editor
    section: 1
  enc:
    categories:
      - Encryption
    description: symmetric cipher routines
    section: 1ssl
  encfs:
    categories:
      - Encryption
    description: mounts or creates an encrypted virtual filesystem
    section: 1
  encfsctl:
    categories:
      - Encryption
    description: administrative tool for working with encfs filesystems
    section: 1
  ent:
    categories:
      - Numbers and Math
    description: pseudorandom number sequence test
    section: 1
  entr:
    categories:
      - Schedule
    description: run arbitrary commands when files change
    section: 1
  env:
    categories:
      - Environment
    description: run a program in a modified environment
    section: 1
  environ:
    categories:
      - Interesting Pages
    description: user environment
    section: 7
  epic5:
    categories:
      - Chat
    description: internet relay chat client for unix like systems
    section: 1
  episoder:
    categories:
      - Websites
      - Task Managers
    description: tv show reminder from epguides.com and thetvdb.com
    section: 1
  eqn:
    categories:
      - Conversion
    description: format equations for troff or mathml
    section: 1
  eresi:
    categories:
      - Debugging
    description: the eresi reverse engineering software interface
    section: 1
  errno:
    categories:
      - Interesting Pages
      - Performances
      - Development
      - Debugging
    description: look up errno names and descriptions
    section: 1
  errno.3:
    categories:
      - Interesting Pages
    description: number of last error
    section: 3
  espeak:
    categories:
      - Text to Speech
    description: a multi-lingual software speech synthesizer
    section: 1
  etex:
    categories:
      - Publishing
    description: extended tex
    section: 1
  ethtool:
    categories:
      - Hardware
      - Performances
      - Network
    description: query or control network driver and hardware settings
    section: 8
  etrace:
    categories:
      - Debugging
    description: the embedded elf tracer
    section: 1
  ettercap:
    categories:
      - Network Capture
    description: sniffer/content filter for man in the middle attacks
    section: 8
  ex:
    categories:
      - Text Utilities
    description: text editor
    section: 1
  exfalso:
    categories:
      - Audio and Music
    description: tag editor for mp3/ogg/flac/musepack/wavpack/mod/xm/it
    section: 1
  exif:
    categories:
      - Images
    description: shows exif information in jpeg files
    section: 1
  exifcom:
    categories:
      - Images
    description: set/display user comment tag contained in a jpeg exif
    section: 1
  exifgrep:
    categories:
      - Images
    description: select and reformat the output of exifprobe
    section: 1
  exifprobe:
    categories:
      - Images
    description: probe and report exif structure and metadata content
    section: 1
  exiftags:
    categories:
      - Images
    description: output the properties contained in a jpeg exif section
    section: 1
  exiftime:
    categories:
      - Images
    description: display/adjust the date and time exif tags
    section: 1
  exiftool:
    categories:
      - Images
    description: read and write meta information in media files
    section: 1
  exiftran:
    categories:
      - Images
    description: transform/rotate digital camera jpeg images
    section: 1
  exo-open:
    categories:
      - X Windows
    description: open urls and launch preferred applications (xfce)
    section: 1
  expand:
    categories:
      - Text Utilities
    description: convert tabs to spaces
    section: 1
  expect:
    categories:
      - Other
    description: automate applications accessed over a terminal
    section: 1
  explain:
    categories:
      - Performances
      - Development
      - Debugging
    description: explain system call error messages
    section: 1
  exportfs:
    categories:
      - Network Filesystems
    description: maintain table of exported nfs file systems
    section: 8
  expr:
    categories:
      - Other
    description: evaluate expressions
    section: 1
  extract:
    categories:
      - Binary Information
    description: determine meta-information about a file
    section: 1
  f2c:
    categories:
      - Development
    description: convert fortran 77 to c or c++
    section: 1
  factor:
    categories:
      - Numbers and Math
    description: factor numbers
    section: 1
  fadecut:
    categories:
      - Audio Editing
    description: 'rip audiostreams, cut, fade in/out and tag audiofiles'
    section: 1
  fallocate:
    categories:
      - Files
    description: preallocate or deallocate space to a file
    section: 1
  false:
    categories:
      - Other
    description: 'do nothing, unsuccessfully'
    section: 1
  faucet:
    categories:
      - Network
      - Network File Transfer
    description: a fixture for a bsd network pipe (netpipes)
    section: 1
  fax:
    categories:
      - Modem/Fax/GSM
    description: fax sending and receiving with mgetty+sendfax
    section: 1
  fax2ps:
    categories:
      - Modem/Fax/GSM
    description: convert a tiff facsimile to compressed postscript
    section: 1
  faxalter:
    categories:
      - Modem/Fax/GSM
    description: alter parameters of a queued hylafax job
    section: 1
  faxcover:
    categories:
      - Modem/Fax/GSM
    description: generate postscript cover page for outgoing facsimile
    section: 1
  faxmail:
    categories:
      - Modem/Fax/GSM
    description: hylafax mail-to-fax (postscript) gateway application
    section: 1
  faxq:
    categories:
      - Modem/Fax/GSM
    description: display fax jobs queued by faxspool
    section: 1
  faxrm:
    categories:
      - Modem/Fax/GSM
    description: remove fax jobs queued by faxspool
    section: 1
  faxrunq:
    categories:
      - Modem/Fax/GSM
    description: send fax jobs queued by faxspool
    section: 1
  faxspool:
    categories:
      - Modem/Fax/GSM
    description: queue and convert files for faxing with sendfax
    section: 1
  faxstat:
    categories:
      - Modem/Fax/GSM
    description: for hylafax facsimile server status
    section: 1
  fbgrab:
    categories:
      - Images
    description: takes a screenshot using the framebuffer device
    section: 1
  fbgs:
    categories:
      - Publishing
    description: postscript/pdf viewer for the framebuffer console
    section: 1
  fbi:
    categories:
      - Images
    description: framebuffer imageviewer
    section: 1
  fc:
    categories:
      - Development
    description: frontend script to the f2c fortran compiler
    section: 1
  fc-cache:
    categories:
      - X Windows
    description: build font information cache files
    section: 1
  fc-cat:
    categories:
      - X Windows
    description: read font information cache files
    section: 1
  fc-list:
    categories:
      - X Windows
    description: list available fonts
    section: 1
  fc-match:
    categories:
      - X Windows
    description: match available fonts
    section: 1
  fc-pattern:
    categories:
      - X Windows
    description: parse and show pattern
    section: 1
  fc-query:
    categories:
      - X Windows
    description: query font files
    section: 1
  fc-scan:
    categories:
      - X Windows
    description: scan font files or directories
    section: 1
  fdformat:
    categories:
      - Filesystem Tools
    description: low-level format a floppy disk
    section: 8
  fdisk:
    categories:
      - Filesystem Tools
    description: partition table manipulator for linux
    section: 8
  fdp:
    categories:
      - Vector Graphics
    description: filter for drawing undirected graphs
    section: 1
  fdupes:
    categories:
      - File Find
    description: finds duplicate files in a given set of directories
    section: 1
  festival:
    categories:
      - Text to Speech
    description: a text-to-speech system
    section: 1
  fetchyahoo:
    categories:
      - EMail
    description: retrieve mail from yahoo webmail service
    section: 1
  ffmpeg:
    categories:
      - Videos
    description: ffmpeg video converter
    section: 1
  fg:
    categories:
      - Processes
    description: brings the most recent job to foreground
    section: 1
  fgrep:
    categories:
      - Text Utilities
    description: search files for lines that match a fixed string (-f)
    section: 1
  fgrope:
    categories:
      - Funny
    description: massage a file for a while
    section: 1fun
  figlet:
    categories:
      - ASCII Art
    description: display text with an ascii art charset
    section: 6
  file:
    categories:
      - Binary Information
    description: determine file type
    section: 1
  file-hierarchy:
    categories:
      - Interesting Pages
    description: file system hierarchy overview
    section: 7
  fim:
    categories:
      - Images
    description: fbi (linux framebuffer imageviewer) improved
    section: 1
  finch:
    categories:
      - Chat
    description: instant messaging client (frontend to libpurple)
    section: 1
  find:
    categories:
      - File Find
    description: search for files in a directory hierarchy
    section: 1
  findimagedupes:
    categories:
      - File Find
      - Images
    description: finds visually similar or duplicate images
    section: 1
  findmnt:
    categories:
      - Filesystem Tools
    description: find a filesystem
    section: 8
  finger:
    categories:
      - Network Apps
    description: user information lookup program
    section: 1
  fio:
    categories:
      - System
      - Performances
    description: flexible i/o tester
    section: 1
  fish:
    categories:
      - Shells
    description: the friendly interactive shell
    section: 1
  fizsh:
    categories:
      - Shells
    description: friendly interactive zshell
    section: 1
  flac:
    categories:
      - Audio and Music
    description: 'encoding, decoding, testing and analyzing flac streams'
    section: 1
  flame:
    categories:
      - Funny
    description: reply to usenet news posting automatically
    section: 1fun
  flex:
    categories:
      - Development
    description: 'lexical analyser, generates code for pattern-matching'
    section: 1
  flickrfs:
    categories:
      - Network Filesystems
    description: virtual filesystem for flickr photosharing service
    section: 1
  flock:
    categories:
      - Files
      - Schedule
    description: manage locks from shell scripts
    section: 1
  flog:
    categories:
      - Funny
    description: speed up a process
    section: 1fun
  fmt:
    categories:
      - Text Utilities
    description: optimally reformat text
    section: 1
  fold:
    categories:
      - Text Utilities
    description: wrap each input line to fit in specified width
    section: 1
  foremost:
    categories:
      - Filesystem Tools
      - Binary Information
    description: recover files using their headers/footers/structures
    section: 8
  fort77:
    categories:
      - Development
    description: fortran compiler
    section: 1
  fortune:
    categories:
      - Games
    description: 'print a random, hopefully interesting, adage'
    section: 6
  free:
    categories:
      - System
      - Performances
    description: display amount of free/used/swap memory in the system
    section: 1
  freetalk:
    categories:
      - Chat
    description: a console based jabber client
    section: 1
  fsck:
    categories:
      - Filesystem Tools
    description: check and repair a linux file system
    section: 8
  fsniper:
    categories:
      - Schedule
    description: watch directories and apply rules to created files
    section: 1
  ftff:
    categories:
      - File Find
    description: fault tolerant file find utility
    section: 1
  ftp:
    categories:
      - Network File Transfer
    description: copy files between hosts
    section: 1
  fuser:
    categories:
      - Debugging
    description: identify processes using files or sockets
    section: 1
  fusermount:
    categories:
      - Filesystem Tools
    description: mount and unmount fuse filesystems
    section: 1
  gammu:
    categories:
      - Modem/Fax/GSM
    description: does some neat things with your cellular phone or modem
    section: 1
  gawk:
    categories:
      - Text Utilities
    description: pattern scanning and processing language
    section: 1
  gcal:
    categories:
      - Date and Time
    description: a program for calculating and printing calendars
    section: 1
  gcalcli:
    categories:
      - Websites
      - Date and Time
      - Task Managers
    description: google calendar command line interface
    section: 1
  gcc:
    categories:
      - Development
    description: gnu project c and c++ compiler
    section: 1
  gdb:
    categories:
      - Debugging
    description: the gnu debugger
    section: 1
  gem:
    categories:
      - Development
    description: the front end to rubygems
    section: 1
  gencat:
    categories:
      - Development
    description: generate a formatted message catalog
    section: 1
  genisoimage:
    categories:
      - CD/DVD/BluRay
    description: create iso9660/joliet/hfs filesystem
    section: 1
  get_flash_videos:
    categories:
      - Network File Transfer
      - Websites
    description: downloader for various flash-based video sites
    section: 1
  getconf:
    categories:
      - Development
    description: get configuration values
    section: 1
  getfacl:
    categories:
      - File Attributes
    description: get file access control lists
    section: 1
  getfattr:
    categories:
      - File Attributes
    description: get extended attributes of filesystem objects
    section: 1
  getopt:
    categories:
      - Other
    description: parse command options
    section: 1
  ghc:
    categories:
      - Development
    description: the glasgow haskell compiler
    section: 1
  ghci:
    categories:
      - Development
    description: the glasgow haskell compiler
    section: 1
  gifsicle:
    categories:
      - Images
    description: manipulates gif images and animations
    section: 1
  git:
    categories:
      - Revision Control
    description: the stupid content tracker
    section: 1
  git-sh:
    categories:
      - Shells
    description: a git shell (bash)
    section: 1
  gitfm:
    categories:
      - File Managers
    description: gnu interactive tools file manager
    section: 1
  gitps:
    categories:
      - Processes
    description: a visual process viewer/killer (gnu interactive tools)
    section: 1
  gittutorial:
    categories:
      - Interesting Pages
    description: a tutorial introduction to git
    section: 7
  gitunpack:
    categories:
      - Compression
    description: 'gnu interactive tools - unified archive unpacking'
    section: 1
  gitview:
    categories:
      - Viewers
    description: an ascii/hex file viewer (gnu interactive tools)
    section: 1
  gitwipe:
    categories:
      - Files
    description: an utility for wiping files (gnu interactive tools)
    section: 1
  glances:
    categories:
      - Processes
      - Performances
    description: a cross-platform curses-based system monitoring tool
    section: 1
  gle:
    categories:
      - Images
    description: graphics layout engine
    section: 1
  glob:
    categories:
      - Interesting Pages
    description: globbing pathnames
    section: 7
  glxinfo:
    categories:
      - X Windows
    description: show information about the glx implementation
    section: 1
  gm:
    categories:
      - Images
    description: graphicsmagick is a set of tools to manipulate images
    section: 1
  gnome-open:
    categories:
      - X Windows
    description: open files and urls using the gnome file handlers
    section: 1
  gnuhtml2latex:
    categories:
      - Conversion
    description: html to latex converter
    section: 1
  gnuplot:
    categories:
      - Numbers and Math
    description: an interactive plotting program
    section: 1
  gocr:
    categories:
      - Images
    description: command line text recognition tool
    section: 1
  goldendict:
    categories:
      - Spelling
    description: a feature-rich dictionary lookup program
    section: 1
  gong:
    categories:
      - Funny
    description: evaluate process performance
    section: 1fun
  google:
    categories:
      - Websites
    description: command-line access to (some) google services
    section: 1
  gopher:
    categories:
      - Browser
    description: connect to gopher document server
    section: 1
  gpg:
    categories:
      - Encryption
    description: openpgp encryption and signing tool
    section: 1
  gpgv:
    categories:
      - Encryption
    description: verify openpgp signatures
    section: 1
  gphotofs:
    categories:
      - Images
    description: filesystem to mount digital cameras
    section: 1
  gprof:
    categories:
      - Development
    description: display call graph profile data
    section: 1
  gramofile:
    categories:
      - Audio Editing
    description: sample and process analog recordings
    section: 1
  greed:
    categories:
      - Games
    description: eat a game field until you run out of moves
    section: 6
  grep:
    categories:
      - Text Utilities
    description: search files for lines of text matching a pattern
    section: 1
  gringotts:
    categories:
      - Other
    description: secure password and data storage manager
    section: 1
  groff:
    categories:
      - Conversion
    description: front-end for the groff document formatting system
    section: 1
  grope:
    categories:
      - Funny
    description: massage a file for a while
    section: 1fun
  groupadd:
    categories:
      - User Management
    description: create a new group
    section: 8
  groupdel:
    categories:
      - User Management
    description: delete a group
    section: 8
  groupmod:
    categories:
      - User Management
    description: modify a group definition on the system
    section: 8
  groups:
    categories:
      - User Information
    description: print group names a user is in
    section: 1
  growisofs:
    categories:
      - CD/DVD/BluRay
    description: combined frontend to cd/dvd/bluray recording program
    section: 1
  grub:
    categories:
      - Filesystem Tools
    description: install grand unified bootloader
    section: 8
  gs:
    categories:
      - Publishing
    description: 'ghostscript, a postscript and pdf interpreter/previewer'
    section: 1
  gtypist:
    categories:
      - Games
    description: typing tutor for different keyboards and languages
    section: 1
  gunzip:
    categories:
      - Compression
    description: expand files (gnu zip)
    section: 1
  guru:
    categories:
      - Funny
    description: system administration
    section: 8fun
  gv:
    categories:
      - Office
      - Conversion
    description: postscript and pdf viewer
    section: 1
  gzexe:
    categories:
      - Compression
    description: compress executable files in place
    section: 1
  gzip:
    categories:
      - Compression
    description: compress files (gnu zip)
    section: 1
  halt:
    categories:
      - Init and Runlevels
    description: reboot or stop the system
    section: 8
  hangman:
    categories:
      - Games
    description: computer version of the game hangman
    section: 6
  hardlink:
    categories:
      - Files
      - File Find
    description: hardinks multiple copies of a file
    section: 1
  hdparm:
    categories:
      - Hardware
      - Performances
    description: get/set sata/ide device parameters
    section: 8
  head:
    categories:
      - Text Utilities
    description: output the first 10 lines of file
    section: 1
  help:
    categories:
      - Getting Help
    description: shell built-in help
    section: 1
  herrie:
    categories:
      - Audio Players
    description: interactive music playlist player
    section: 1
  hexdiff:
    categories:
      - Binary Information
    description: hexadecimal visual diff for binary files
    section: 1
  hexdump:
    categories:
      - Binary Information
    description: 'ascii, decimal, hexadecimal, octal dump'
    section: 1
  hexedit:
    categories:
      - Binary Information
    description: view and edit files in hexadecimal or in ascii
    section: 1
  hg:
    categories:
      - Revision Control
    description: mercurial source code management system
    section: 1
  hier:
    categories:
      - Interesting Pages
    description: description of the filesystem hierarchy
    section: 7
  highlight:
    categories:
      - Development
    description: 'universal code highlighter converter (html, rtf, ...)'
    section: 1
  hnb:
    categories:
      - Office
    description: hierarchical notebook
    section: 1
  hose:
    categories:
      - Network
      - Network File Transfer
    description: the client end of a bsd network pipe (netpipes)
    section: 1
  host:
    categories:
      - Network
    description: dns lookup utility
    section: 1
  hostid:
    categories:
      - System
    description: print the numeric identifier for the current host
    section: 1
  hostname:
    categories:
      - Network
    description: print the system hostname
    section: 1
  hping3:
    categories:
      - Performances
      - Network
    description: send (almost) arbitrary tcp/ip packets to network hosts
    section: 8
  hpodder:
    categories:
      - Podcast
    description: scan and download podcasts
    section: 1
  hte:
    categories:
      - Binary Information
    description: executable's editor
    section: 1
  html2markdown:
    categories:
      - Conversion
    description: converts html to markdown-formatted text
    section: 1
  html2text:
    categories:
      - Conversion
    description: an advanced html-to-text converter
    section: 1
  htop:
    categories:
      - Processes
      - Performances
    description: interactive process viewer
    section: 1
  httpry:
    categories:
      - Network Capture
    description: http logging and information retrieval tool
    section: 1
  httrack:
    categories:
      - Network File Transfer
      - Browser
    description: 'offline browser : copy websites to a local directory'
    section: 1
  hunt:
    categories:
      - Games
    description: a multi-player multi-terminal game
    section: 6
  hwinfo:
    categories:
      - Hardware
    description: probe for hardware
    section: 8
  iconv:
    categories:
      - Text Utilities
      - Conversion
    description: convert encoding of given files
    section: 1
  icotool:
    categories:
      - Images
    description: convert and create win32 icon and cursor files
    section: 1
  id:
    categories:
      - User Information
    description: print real and effective user and group ids
    section: 1
  id3:
    categories:
      - Audio and Music
    description: id3 tag editor
    section: 1
  id3ed:
    categories:
      - Audio and Music
    description: edit id3 description tags in mpeg3 files
    section: 1
  id3tool:
    categories:
      - Audio and Music
    description: a command line editor for id3 tags
    section: 1
  id3v2:
    categories:
      - Audio and Music
    description: 'add/change/remove/view id3v2 tags, converts/lists id3v1'
    section: 1
  ident:
    categories:
      - Debugging
    description: identify rcs keyword strings in files
    section: 1
  identify:
    categories:
      - Images
    description: describes the format and characteristics of images
    section: 1
  ifconfig:
    categories:
      - Network
    description: set/display network information
    section: 8
  ifdata:
    categories:
      - Network
    description: get network interface info without ifconfig parsing
    section: 1
  ifdown:
    categories:
      - Network
    description: stop a network interface
    section: 8
  ifetch:
    categories:
      - Other
    description: image collection tool for ip cameras of ifetch-tools
    section: 1
  ifne:
    categories:
      - Pipes
    description: run command if the standard input is not empty
    section: 1
  ifstat:
    categories:
      - Network
    description: report interface statistics
    section: 1
  iftop:
    categories:
      - Network Monitor
    description: display bandwidth usage on an interface by host
    section: 8
  ifup:
    categories:
      - Network
    description: bring a network interface up
    section: 8
  ii:
    categories:
      - Chat
    description: a minimalistic fifo and filesystem based irc client
    section: 1
  imdb:
    categories:
      - Videos
    description: calls any of the imdb functions
    section: 1
  imdb-fxd:
    categories:
      - Videos
    description: creates fxd files from the imdb cache for freevo
    section: 1
  imdb-get:
    categories:
      - Videos
    description: looks up imdb data for a film
    section: 1
  imdb-link:
    categories:
      - Videos
    description: links films based on their genre
    section: 1
  imdb-rename:
    categories:
      - Videos
    description: renames files based on their title
    section: 1
  imdb-update-cache:
    categories:
      - Videos
    description: updates the imdb cache for a given directory
    section: 1
  img2txt:
    categories:
      - Conversion
    description: convert images to various text-based coloured files
    section: 1
  import:
    categories:
      - X Windows
    description: window/screenshot
    section: 1
  imvirt:
    categories:
      - System
      - Hardware
    description: detects several virtualizations
    section: 1
  indent:
    categories:
      - Development
    description: 'reformat a c program, inserting or deleting whitespace'
    section: 1
  info:
    categories:
      - Getting Help
    description: read info documents
    section: 1
  infocmp:
    categories:
      - Terminal Tools
    description: compare or print out terminfo descriptions
    section: 1
  infotocap:
    categories:
      - Terminal Tools
    description: convert a terminfo description into termcap description
    section: 1
  initctl:
    categories:
      - Init and Runlevels
    description: upstart service configuration
    section: 8
  ink:
    categories:
      - Print
    description: tool for checking the ink level of your printers
    section: 1
  inkscape:
    categories:
      - Vector Graphics
    description: svg (scalable vector graphics) editing program
    section: 1
  inotifywait:
    categories:
      - Files
      - Schedule
    description: wait for changes to files using inotify
    section: 1
  inotifywatch:
    categories:
      - Files
    description: gather filesystem access statistics using inotify
    section: 1
  insmod:
    categories:
      - Kernel
    description: simple program to insert a module into the linux kernel
    section: 8
  install:
    categories:
      - Files
    description: copy files and set attributes
    section: 1
  intro.1:
    categories:
      - Interesting Pages
    description: user commands
    section: 1
  intro.2:
    categories:
      - Interesting Pages
    description: system calls
    section: 2
  intro.3:
    categories:
      - Interesting Pages
    description: library functions
    section: 3
  intro.4:
    categories:
      - Interesting Pages
    description: special files
    section: 4
  intro.5:
    categories:
      - Interesting Pages
    description: file formats
    section: 5
  intro.6:
    categories:
      - Interesting Pages
    description: games
    section: 6
  intro.7:
    categories:
      - Interesting Pages
    description: overview/conventions/miscellany section
    section: 7
  intro.8:
    categories:
      - Interesting Pages
    description: administration and privileged commands
    section: 8
  inxi:
    categories:
      - System
    description: lists kernel/drivers/cpu/ram/gcc/xorg/desktop/etc.
    section: 1
  ionice:
    categories:
      - Processes
      - Performances
    description: set or get process i/o scheduling class and priority
    section: 1
  iostat:
    categories:
      - System
      - Performances
    description: 'report cpu and io statistics for dev, part and nfs'
    section: 1
  iotop:
    categories:
      - System
      - Performances
    description: simple top-like i/o monitor
    section: 8
  ip:
    categories:
      - Network
      - Network Tunnels
    description: 'show/manip routing, devices, policy routing and tunnels'
    section: 8
  ip-tunnel:
    categories:
      - Network Tunnels
    description: tunnel configuration
    section: 8
  ip6tables:
    categories:
      - Network
    description: ipv6 packet filter administration
    section: 8
  ip6tables-restore:
    categories:
      - Network
    description: restore ipv6 tables
    section: 8
  ip6tables-save:
    categories:
      - Network
    description: dump iptables rules to stdout
    section: 8
  ipcalc:
    categories:
      - Network
    description: ipv4 netmask/broadcast/etc calculator
    section: 1
  ipchains:
    categories:
      - Network
    description: control the packet filter/firewall (see iptables)
    section: 8
  ipcrm:
    categories:
      - Processes
    description: 'remove message, semaphore, or shared memory identifier'
    section: 1
  ipcs:
    categories:
      - Processes
    description: report interprocess communication facilities status
    section: 1
  iperf:
    categories:
      - Performances
      - Network
    description: perform network throughput tests
    section: 1
  iptables:
    categories:
      - Network
    description: administration tool for ipv4 filtering and nat
    section: 8
  iptables-restore:
    categories:
      - Network
    description: restore ip tables
    section: 8
  iptables-save:
    categories:
      - Network
    description: dump iptables rules to stdout
    section: 8
  iptraf:
    categories:
      - Performances
      - Network Monitor
    description: interactive colorful ip lan monitor
    section: 8
  iptstate:
    categories:
      - Network
    description: top-like display of ip tables state table entries
    section: 8
  ipv6calc:
    categories:
      - Network
    description: a small utility to manipulate ipv6 addresses
    section: 8
  irb:
    categories:
      - Development
    description: interactive ruby
    section: 1
  irssi:
    categories:
      - Chat
    description: a modular irc client for unix
    section: 1
  isadump:
    categories:
      - Hardware
    description: examine isa registers
    section: 8
  ispell:
    categories:
      - Spelling
    description: check spelling in batch or interactively
    section: 1
  isutf8:
    categories:
      - Conversion
    description: check whether files are valid utf-8
    section: 1
  iw:
    categories:
      - Wireless
    description: show/manipulate wireless devices and configuration
    section: 8
  iwconfig:
    categories:
      - Wireless
    description: configure a wireless network interface
    section: 8
  iwevent:
    categories:
      - Wireless
    description: show wireless events generated by drivers and hardware
    section: 8
  iwgetid:
    categories:
      - Wireless
    description: 'report essid, nwid, ap/cell address of wireless network'
    section: 8
  iwlist:
    categories:
      - Wireless
    description: detailed information about a wireless interface
    section: 8
  jack:
    categories:
      - CD/DVD/BluRay
    description: rip and encode cds with one command
    section: 1
  jardiff:
    categories:
      - Development
    description: visualise api differences between two jar files
    section: 1
  java:
    categories:
      - Development
    description: the java application launcher
    section: 1
  javac:
    categories:
      - Development
    description: java programming language compiler
    section: 1
  javadoc:
    categories:
      - Development
    description: the java api documentation generator
    section: 1
  jed:
    categories:
      - Editors
    description: programmers editor
    section: 1
  jhead:
    categories:
      - Images
    description: digicam jpeg exif header manipulation tool
    section: 1
  jnettop:
    categories:
      - Network Monitor
    description: view hosts/ports taking up the most network traffic
    section: 8
  jobs:
    categories:
      - Processes
    description: lists the active jobs
    section: 1
  jodconverter:
    categories:
      - Conversion
    description: import/export documents using the libreoffice filters
    section: 1
  join:
    categories:
      - Text Utilities
    description: join lines of two files on a common field
    section: 1
  jot:
    categories:
      - Numbers and Math
    description: print sequential or random data
    section: 1
  journalctl:
    categories:
      - Init and Runlevels
    description: query the systemd journal
    section: 1
  jp2a:
    categories:
      - Images
    description: convert jpeg images to ascii
    section: 1
  jpegtran:
    categories:
      - Images
    description: lossless transformation of jpeg files
    section: 1
  jq:
    categories:
      - Development
    description: command-line json processor
    section: 1
  js_beautify:
    categories:
      - Development
    description: command tool to beautify your javascript files
    section: 1
  jsoncat:
    categories:
      - Development
    description: display json data
    section: 1
  jsonlint:
    categories:
      - Development
    description: json syntax validator and formatter tool
    section: 1
  justniffer:
    categories:
      - Performances
    description: an extensive tcp flow sniffer
    section: 8
  kdialog:
    categories:
      - X Windows
    description: show kde dialog boxes from shell scripts
    section: 1
  kibitz:
    categories:
      - Terminal Tools
    description: allow two people to interact with one shell
    section: 1
  kill:
    categories:
      - Processes
    description: send a signal to a process
    section: 1
  killall:
    categories:
      - Processes
    description: kill all processes named proc
    section: 1
  kismet:
    categories:
      - Wireless
      - Network Capture
    description: wireless sniffing and monitoring
    section: 1
  knife:
    categories:
      - Funny
    description: tools to improve network performance via snip
    section: 8fun
  konqueror:
    categories:
      - Getting Help
    description: browse man:/info:/perldoc:/etc. thanks to kio
    section: 1
  ksh:
    categories:
      - Shells
    description: 'kornshell, a command and programming language'
    section: 1
  ktap:
    categories:
      - Performances
      - Debugging
    description: lightweight script-based dynamic tracing tool for linux
    section: 1
  lame:
    categories:
      - Audio and Music
    description: create mp3 audio files
    section: 1
  lart:
    categories:
      - Funny
    description: luser attitude readjustment tool
    section: 1fun
  last:
    categories:
      - User Information
    description: show listing of last logged in users
    section: 1
  lastb:
    categories:
      - User Information
    description: show listing of bad loggin attemps
    section: 1
  lastcomm:
    categories:
      - User Information
    description: print information about previously executed commands
    section: 1
  lastlog:
    categories:
      - User Information
    description: reports recent login of all users or of a given user
    section: 8
  latex:
    categories:
      - Publishing
    description: structured text formatting and typesetting
    section: 1
  latexdiff:
    categories:
      - Publishing
    description: determine and markup differences between two latex files
    section: 1
  latexmk:
    categories:
      - Publishing
    description: generate latex document
    section: 1
  lckdo:
    categories:
      - Schedule
    description: run a program with a lock held
    section: 1
  ld:
    categories:
      - Development
    description: the gnu linker
    section: 1
  ld.so:
    categories:
      - Debugging
    description: dynamic linker-loader
    section: 8
  ldconfig:
    categories:
      - Debugging
    description: configure dynamic linker run-time bindings
    section: 8
  ldd:
    categories:
      - Debugging
    description: print shared library dependencies
    section: 1
  ledger:
    categories:
      - Office
    description: command-line accounting
    section: 1
  less:
    categories:
      - Viewers
    description: opposite of more
    section: 1
  lex:
    categories:
      - Development
    description: generate programs for lexical tasks
    section: 1
  lftp:
    categories:
      - Network File Transfer
    description: sophisticated file transfer program
    section: 1
  libc:
    categories:
      - Interesting Pages
    description: overview of standard c libraries on linux
    section: 7
  lilo:
    categories:
      - Filesystem Tools
    description: install linux boot loader
    section: 8
  link:
    categories:
      - Files
    description: create a hard link to a file
    section: 1
  linkchecker:
    categories:
      - Network File Transfer
    description: check html documents and websites for broken links
    section: 1
  links:
    categories:
      - Browser
    description: lynx-like alternative character mode www browser
    section: 1
  links2:
    categories:
      - Browser
    description: lynx-like alternative character mode www browser
    section: 1
  linux_logo:
    categories:
      - ASCII Art
    description: color ansi penguin logo with system information
    section: 1
  listres:
    categories:
      - X Windows
    description: list resources in widgets
    section: 1
  lldpad:
    categories:
      - Network
    description: link layer discovery protocol (lldp) agent daemon
    section: 8
  lldptool:
    categories:
      - Performances
      - Network
    description: manage the lldp settings and status of lldpad
    section: 8
  llines:
    categories:
      - Other
    description: 'lifelines genealogy program, gedcom format'
    section: 1
  llttng:
    categories:
      - Performances
      - Debugging
    description: tracer control command line tool
    section: 1
  lmbench:
    categories:
      - System
      - Performances
    description: system benchmarks
    section: 8
  ln:
    categories:
      - Files
    description: make filesystem links
    section: 1
  lnav:
    categories:
      - Viewers
    description: ncurses-based log file viewer
    section: 1
  loadkeys:
    categories:
      - Hardware
    description: load keyboard translation tables
    section: 1
  locale:
    categories:
      - Environment
    description: get locale-specific information
    section: 1
  locale.7:
    categories:
      - Interesting Pages
    description: description of multilanguage support
    section: 7
  localedef:
    categories:
      - Environment
    description: compile locale definition files
    section: 1
  locate:
    categories:
      - File Find
    description: locate files via index (m/slocate)
    section: 1
  logger:
    categories:
      - System
    description: a shell interface to the syslog system log module
    section: 1
  loginctl:
    categories:
      - Init and Runlevels
    description: control the systemd login manager
    section: 1
  logname:
    categories:
      - User Information
    description: print the login name of a user
    section: 1
  logwatch:
    categories:
      - System
    description: system log analyzer and reporter
    section: 8
  lolcat:
    categories:
      - Viewers
      - ASCII Art
    description: rainbow coloring for text
    section: 6
  look:
    categories:
      - Text Utilities
    description: display lines beginning with a given string
    section: 1
  lp:
    categories:
      - Print
    description: send files to a printer
    section: 1
  lpadmin:
    categories:
      - Print
    description: configure cups printers and classes
    section: 8
  lpc:
    categories:
      - Print
    description: line printer control program
    section: 8
  lpmove:
    categories:
      - Print
    description: move a job or all jobs to a new destination
    section: 8
  lpoptions:
    categories:
      - Print
    description: display or set cups printer options and defaults
    section: 1
  lpq:
    categories:
      - Print
    description: show printer queue status
    section: 1
  lpr:
    categories:
      - Print
    description: print files
    section: 1
  lprm:
    categories:
      - Print
    description: remove print jobs
    section: 1
  lpstat:
    categories:
      - Print
    description: print cups status information
    section: 1
  ls:
    categories:
      - Files
    description: list directory contents and files
    section: 1
  lsattr:
    categories:
      - File Attributes
    description: list advanced file attributes on a ext file system
    section: 1
  lsb_release:
    categories:
      - System
    description: print distribution-specific information
    section: 1
  lsblk:
    categories:
      - Hardware
    description: list block devices
    section: 8
  lsdev:
    categories:
      - Hardware
    description: display information about installed hardware
    section: 8
  lshal:
    categories:
      - Hardware
    description: lists all devices the hardware abstraction layer knows
    section: 1
  lshw:
    categories:
      - Hardware
    description: list hardware
    section: 1
  lslk:
    categories:
      - Debugging
    description: list local locks
    section: 8
  lsmod:
    categories:
      - Kernel
    description: program to show the status of modules in linux kernel
    section: 8
  lsof:
    categories:
      - Debugging
      - Network
    description: list open files/streams/sockets/etc
    section: 8
  lspci:
    categories:
      - Hardware
    description: list all pci devices
    section: 8
  lsusb:
    categories:
      - Hardware
    description: list usb devices
    section: 8
  ltrace:
    categories:
      - Performances
      - Debugging
    description: a library call tracer
    section: 1
  lua:
    categories:
      - Development
    description: lua interpreter
    section: 1
  luac:
    categories:
      - Development
    description: lua compiler
    section: 1
  luadoc:
    categories:
      - Development
    description: generate documentation from files
    section: 1
  luarocks:
    categories:
      - Development
    description: module deployment system for lua
    section: 1
  luser:
    categories:
      - Funny
    description: process to control the clueless individuals
    section: 8fun
  lxsplit:
    categories:
      - Text Utilities
    description: a simple tool for splitting and joining split files
    section: 1
  lynx:
    categories:
      - Browser
    description: 'a general purpose, text-only browser for the www'
    section: 1
  lz:
    categories:
      - Compression
    description: provides a listing of a tar.gz archive
    section: 1
  lzip:
    categories:
      - Compression
    description: reduces the size of files
    section: 1
  lzma:
    categories:
      - Compression
    description: lzma compression and decompression tool
    section: 1
  lzma2:
    categories:
      - Compression
    description: lzma compression and decompression tool
    section: 1
  m4:
    categories:
      - Development
    description: macro processor
    section: 1
  mad:
    categories:
      - Viewers
    description: append files by wildcard patterns
    section: 1
  madplay:
    categories:
      - Audio Players
    description: decode and play mpeg audio stream(s)
    section: 1
  mail:
    categories:
      - EMail
    description: minimal client to send and receive mail
    section: 1
  mailx:
    categories:
      - EMail
    description: send and receive internet mail
    section: 1
  make:
    categories:
      - Development
    description: gnu make utility to maintain groups of programs
    section: 1
  makepasswd:
    categories:
      - Other
    description: generate and/or encrypt passwords
    section: 1
  man:
    categories:
      - Getting Help
    description: an interface to the on-line reference manuals
    section: 1
  man-pages:
    categories:
      - Interesting Pages
    description: conventions for writing linux man pages
    section: 7
  markdown:
    categories:
      - Conversion
    description: convert markdown syntax to (x)html
    section: 1
  mathomatic:
    categories:
      - Numbers and Math
    description: a computer algebra system
    section: 1
  mawk:
    categories:
      - Text Utilities
    description: pattern scanning and processing language
    section: 1
  maxima:
    categories:
      - Numbers and Math
    description: common lisp version of macsyma symbolic mathematics
    section: 1
  mc:
    categories:
      - File Managers
    description: 'midnight commander, visual shell for unix-like systems'
    section: 1
  mcabber:
    categories:
      - Chat
    description: a simple jabber console client
    section: 1
  mcdiff:
    categories:
      - File Compare
    description: visual shell for unix-like systems
    section: 1
  mcdp:
    categories:
      - CD/DVD/BluRay
      - Audio Players
    description: a small cdplayer for linux
    section: 1
  mcedit:
    categories:
      - Editors
    description: internal file editor of gnu midnight commander
    section: 1
  mcp:
    categories:
      - Files
    description: copy files by wildcard patterns
    section: 1
  mcrypt:
    categories:
      - Encryption
    description: 'encrypt files, several algorythms'
    section: 1
  mcview:
    categories:
      - Binary Information
      - Viewers
    description: midnight commander internal file viewer (ascii/hex)
    section: 1
  md5pass:
    categories:
      - File Compare
    description: create an md5 password hash
    section: 1
  md5sum:
    categories:
      - File Compare
    description: compute and check md5 message digest
    section: 1
  mediainfo:
    categories:
      - Binary Information
      - Videos
      - Audio and Music
    description: display information about audio/video files
    section: 1
  memdump:
    categories:
      - Debugging
    description: memory dumper
    section: 1
  mencoder:
    categories:
      - Videos
    description: 'video decoding, encoding and filtering tool'
    section: 1
  merge:
    categories:
      - File Compare
    description: three-way file merge
    section: 1
  mesg:
    categories:
      - User Information
      - Chat
    description: control write access to your terminal
    section: 1
  mf:
    categories:
      - Publishing
    description: 'metafont, a language for font and logo design'
    section: 1
  mgetty:
    categories:
      - Modem/Fax/GSM
    description: smart data/fax modem getty
    section: 8
  mhddfs:
    categories:
      - Filesystem Tools
    description: combines a several mount points into a single one
    section: 1
  midi2abc:
    categories:
      - Midi
    description: program to convert midi format files to abc notation
    section: 1
  mii-tool:
    categories:
      - Hardware
      - Network
    description: 'view, manipulate media-independent interface status'
    section: 8
  mikmod:
    categories:
      - Audio Players
    description: play soundtracker modules on a unix machine
    section: 1
  mille:
    categories:
      - Games
    description: play mille bornes
    section: 6
  mimeopen:
    categories:
      - Binary Information
      - X Windows
    description: open files by mimetype
    section: 1
  mimetype:
    categories:
      - Binary Information
    description: identify file types
    section: 1
  minicom:
    categories:
      - Modem/Fax/GSM
    description: friendly serial communication program
    section: 1
  mispipe:
    categories:
      - Pipes
    description: pipe two commands returning the exit status of the first
    section: 1
  missing:
    categories:
      - Interesting Pages
    description: missing manual pages
    section: 7
  mkdir:
    categories:
      - Directories
    description: make directories
    section: 1
  mkfifo:
    categories:
      - Files
    description: create named pipe
    section: 1
  mkfs:
    categories:
      - Filesystem Tools
    description: build a linux file system
    section: 8
  mkisofs:
    categories:
      - CD/DVD/BluRay
    description: create an hybrid iso9660 joliet hfs filesystem
    section: 1
  mknod:
    categories:
      - Files
    description: make block or character special files
    section: 1
  mksh:
    categories:
      - Shells
    description: mirbsd kornshell
    section: 1
  mktemp:
    categories:
      - Files
    description: create a temporary file or directory
    section: 1
  mktorrent:
    categories:
      - Network File Transfer
    description: simple bittorrent metainfo file creator
    section: 1
  mln:
    categories:
      - Files
    description: link files by wildcard patterns
    section: 1
  mmv:
    categories:
      - Files
    description: move files by wildcard patterns
    section: 1
  mocp:
    categories:
      - Audio Players
    description: console audio player
    section: 1
  modconf:
    categories:
      - Kernel
    description: a module configuration utility
    section: 8
  modinfo:
    categories:
      - Kernel
    description: program to show information about a linux kernel module
    section: 8
  modprobe:
    categories:
      - Kernel
    description: program to add and remove modules from the linux kernel
    section: 8
  mogrify:
    categories:
      - Images
    description: inplace convert/edit/resize/blur/crop/etc an image
    section: 1
  monop:
    categories:
      - Games
    description: monopoly game
    section: 6
  moon-buggy:
    categories:
      - Games
    description: drive some car across the moon
    section: 6
  moosic:
    categories:
      - Audio Players
    description: a command-line client for the moosic jukebox system
    section: 1
  more:
    categories:
      - Viewers
    description: file perusal filter for viewing
    section: 1
  most:
    categories:
      - Viewers
    description: browse or page through a text file
    section: 1
  mount:
    categories:
      - Filesystem Tools
    description: mount a filesystem
    section: 8
  mountpoint:
    categories:
      - Filesystem Tools
    description: see if a directory is a mountpoint
    section: 1
  mp3blaster:
    categories:
      - Audio Players
    description: an interactive text-console based mp3 player
    section: 1
  mp3burn:
    categories:
      - CD/DVD/BluRay
    description: 'burn audio cds from mp3, ogg vorbis, or flac files'
    section: 1
  mpc:
    categories:
      - Audio Players
    description: program for controlling music player daemon (mpd)
    section: 1
  mpc123:
    categories:
      - Audio Players
    description: your handy musepack audio player
    section: 1
  mpg123:
    categories:
      - Audio Players
    description: 'play audio mpeg 1.0/2.0/2.5 stream (layers 1, 2 and 3)'
    section: 1
  mpg321:
    categories:
      - Audio Players
    description: simple and lightweight command line mp3 player
    section: 1
  mpgtx:
    categories:
      - Videos
    description: manipulate mpeg files
    section: 1
  mplayer:
    categories:
      - Videos
      - Audio and Music
      - Audio Players
    description: video/audio player/streamer
    section: 1
  mplex:
    categories:
      - Videos
    description: mpeg 1/2 program/system stream multiplexer
    section: 1
  mpstat:
    categories:
      - System
      - Performances
    description: report processors related statistics
    section: 1
  msmtp:
    categories:
      - EMail
    description: an smtp client
    section: 1
  msort:
    categories:
      - Text Utilities
    description: sort records in complex ways
    section: 1
  mt:
    categories:
      - Backup
    description: control magnetic tape drive operation
    section: 1
  mtools:
    categories:
      - Filesystem Tools
    description: utilities to access dos disks in unix
    section: 1
  mtr:
    categories:
      - Performances
      - Network
    description: traceroute and ping programs diagnostic tool
    section: 8
  mtrace:
    categories:
      - Debugging
    description: interpret output from malloc_trace
    section: 1
  mulk:
    categories:
      - Network File Transfer
    description: parallel network downloader with filtering and metalink
    section: 1
  multitail:
    categories:
      - Text Utilities
    description: browse through several files at once
    section: 1
  multitee:
    categories:
      - Pipes
      - Text Utilities
    description: send multiple inputs to multiple outputs
    section: 1
  mussort:
    categories:
      - Audio and Music
    description: sort music files into folders
    section: 1
  mutool:
    categories:
      - Publishing
    description: all purpose tool for dealing with pdf files
    section: 1
  mutt:
    categories:
      - EMail
    description: text-based email client
    section: 1
  mv:
    categories:
      - Files
    description: move (rename) files
    section: 1
  mybashburn:
    categories:
      - CD/DVD/BluRay
    description: burn data cds/dvds and create mp3/ogg/flac
    section: 1
  mysql:
    categories:
      - Database
    description: the mysql command-line tool
    section: 1
  nano:
    categories:
      - Editors
    description: a small and friendly text editor
    section: 1
  nasm:
    categories:
      - Development
    description: 'the netwide assembler, a portable 80x86 assembler'
    section: 1
  nc:
    categories:
      - Network
      - Network File Transfer
    description: 'netcat, arbitrary tcp and udp connections and listens'
    section: 1
  ncal:
    categories:
      - Date and Time
    description: cal with an alternative layout
    section: 1
  ncat:
    categories:
      - Network
      - Network File Transfer
    description: concatenate and redirect sockets
    section: 1
  ncdu:
    categories:
      - Files
    description: ncurses disk usage
    section: 1
  ncftp:
    categories:
      - Network File Transfer
    description: browser program for the file transfer protocol
    section: 1
  ncftpget:
    categories:
      - Network File Transfer
    description: internet file transfer program for scripts
    section: 1
  ncftpput:
    categories:
      - Network File Transfer
    description: internet file transfer program for scripts
    section: 1
  ncmpc:
    categories:
      - Audio Players
    description: curses music player daemon (mpd) client
    section: 1
  ndiff:
    categories:
      - Network Scan
      - File Compare
    description: utility to compare the results of nmap scans
    section: 1
  neato:
    categories:
      - Vector Graphics
    description: filter for drawing undirected graphs
    section: 1
  neqn:
    categories:
      - Conversion
    description: format equations for ascii output
    section: 1
  nethack:
    categories:
      - Games
    description: exploring the mazes of menace
    section: 6
  nethogs:
    categories:
      - Network Monitor
    description: 'a small net top tool, displays usage per process'
    section: 8
  netload:
    categories:
      - Network Monitor
    description: network device load monitor
    section: 1
  netrik:
    categories:
      - Browser
    description: the antrik internet browser
    section: 1
  netstat:
    categories:
      - Performances
      - Network
    description: 'print connections, routing, masquerade, multicast stats'
    section: 8
  netwatch:
    categories:
      - Network Monitor
    description: ethernet internet protocol monitor
    section: 1
  newgrp:
    categories:
      - User Management
    description: log in to a new group
    section: 1
  newsbeuter:
    categories:
      - RSS Reader
    description: an rss feed reader for text terminals
    section: 1
  newusers:
    categories:
      - User Management
    description: update and create new users in batch
    section: 8
  nfsiostat:
    categories:
      - Network Filesystems
    description: report input/output statistics for nfs
    section: 1
  nfsstat:
    categories:
      - Network Filesystems
    description: list nfs statistics
    section: 8
  ngrep:
    categories:
      - Network Capture
    description: network grep
    section: 8
  nice:
    categories:
      - Processes
      - Performances
    description: set/run a program with modified scheduling priority
    section: 1
  nicstat:
    categories:
      - Performances
      - Network Monitor
    description: print network traffic statistics
    section: 1
  ninvaders:
    categories:
      - Games
    description: ncurses version of space invaders
    section: 6
  nisdomainname:
    categories:
      - Network
    description: show or set the system's nis domain name
    section: 1
  nl:
    categories:
      - Text Utilities
    description: number lines of files
    section: 1
  nload:
    categories:
      - Network Monitor
    description: displays the current network usage
    section: 1
  nm:
    categories:
      - Debugging
    description: list symbols from object files
    section: 1
  nm-tool:
    categories:
      - Network
    description: utility to report networkmanager state and devices
    section: 1
  nmap:
    categories:
      - Network Scan
    description: network exploration tool and security / port scanner
    section: 1
  nmcli:
    categories:
      - Network
    description: command-line tool for controlling networkmanager
    section: 1
  nmon:
    categories:
      - System
    description: 'systems administrator, tuner, benchmark tool'
    section: 1
  nmtui:
    categories:
      - Network
    description: text user interface for controlling networkmanager
    section: 1
  nn:
    categories:
      - Newsgroups
    description: efficient net news interface (no news is good news)
    section: 1
  node:
    categories:
      - Development
    description: server-side javascript
    section: 1
  nohup:
    categories:
      - Processes
    description: 'runs a command immune to hangups, outputs to a non-tty'
    section: 1
  normality:
    categories:
      - Funny
    description: defines types of normality different users may have
    section: 5fun
  normalize-audio:
    categories:
      - Audio Editing
    description: adjusts volume levels of audio files
    section: 1
  notify-send:
    categories:
      - X Windows
    description: a program to send desktop notifications
    section: 1
  notmuch:
    categories:
      - EMail
    description: 'thread-based email index, search, and tagging'
    section: 1
  nping:
    categories:
      - Network Scan
    description: network packet generation tool / ping utility
    section: 1
  nproc:
    categories:
      - System
    description: print the number of processing units available
    section: 1
  nroff:
    categories:
      - Conversion
    description: emulate nroff command with groff
    section: 1
  nrss:
    categories:
      - RSS Reader
    description: an ncurses rss reader
    section: 1
  nslookup:
    categories:
      - Network
    description: query internet name servers interactively
    section: 1
  ntop:
    categories:
      - Network Monitor
    description: display top network users
    section: 8
  ntopng:
    categories:
      - Network Monitor
    description: display top network users
    section: 8
  ntptrace:
    categories:
      - Network
    description: trace a chain of ntp servers back to the primary source
    section: 1
  nuke:
    categories:
      - Funny
    description: launch nuclear weapons at mapped usenet sites
    section: 8fun
  numaverage:
    categories:
      - Numbers and Math
    description: find the average of a set of numbers
    section: 1
  numbound:
    categories:
      - Numbers and Math
    description: find boundary numbers in files or stdin
    section: 1
  numfmt:
    categories:
      - Numbers and Math
    description: convert numbers from/to human-readable strings
    section: 1
  numgrep:
    categories:
      - Numbers and Math
    description: the numeric equivilent of the grep utility
    section: 1
  numinterval:
    categories:
      - Numbers and Math
    description: show the numeric intervals between each line in a file
    section: 1
  numnormalize:
    categories:
      - Numbers and Math
    description: 'normalize a set of numbers, by default between 0 and 1'
    section: 1
  numprocess:
    categories:
      - Numbers and Math
    description: this program mutates numbers as it encounters them
    section: 1
  numrandom:
    categories:
      - Numbers and Math
    description: print out a random number
    section: 1
  numrange:
    categories:
      - Numbers and Math
    description: print out a range of numbers for use in for loops
    section: 1
  numround:
    categories:
      - Numbers and Math
    description: rounds off numbers it encounters.
    section: 1
  numsum:
    categories:
      - Numbers and Math
    description: take the first numbers on stdin and return the sum
    section: 1
  nuttcp:
    categories:
      - Network
    description: network performance measurement tool
    section: 8
  o3read:
    categories:
      - Conversion
    description: dump of an openoffice.org document parse tree
    section: 1
  o3tohtml:
    categories:
      - Conversion
    description: convert files in openoffice.org format to html
    section: 1
  o3totxt:
    categories:
      - Conversion
    description: convert files in openoffice.org format to text
    section: 1
  objcopy:
    categories:
      - Debugging
    description: copy and translate object files
    section: 1
  objdump:
    categories:
      - Debugging
    description: display information from object files
    section: 1
  ocp:
    categories:
      - CD/DVD/BluRay
      - Audio Players
    description: open cubic music player
    section: 1
  octave:
    categories:
      - Numbers and Math
    description: matlab like language for numerical computations
    section: 1
  od:
    categories:
      - Binary Information
    description: dump files in octal and other formats
    section: 1
  odt2txt:
    categories:
      - Conversion
    description: a simple converter from opendocument text to plain text
    section: 1
  ogg123:
    categories:
      - Audio Players
    description: plays ogg vorbis files
    section: 1
  oggenc:
    categories:
      - Audio and Music
    description: encode audio into the ogg vorbis format
    section: 1
  oleo:
    categories:
      - Office
    description: the gnu spreadsheet program
    section: 1
  olive:
    categories:
      - RSS Reader
    description: console rss reader
    section: 1
  op:
    categories:
      - Security Context
    description: grant trusted users access to certain root operations
    section: 1
  openssl:
    categories:
      - Encryption
    description: openssl command line tool
    section: 1ssl
  openvt:
    categories:
      - Terminal Tools
    description: start a program on a new virtual terminal (vt)
    section: 1
  optipng:
    categories:
      - Images
    description: advanced optimization program for
    section: 1
  orpheus:
    categories:
      - Audio Players
    description: text mode menu and window-driven audio player
    section: 1
  osd_cat:
    categories:
      - X Windows
    description: x on-screen file displayer
    section: 1
  overkill:
    categories:
      - Games
    description: bloody 2d action deathmatch-like game in ascii-art
    section: 6
  p0f:
    categories:
      - Network Scan
    description: identify remote systems passively
    section: 1
  pacman:
    categories:
      - Setup
    description: package manager utility (archlinux)
    section: 8
  pactl:
    categories:
      - Hardware
    description: control a running pulseaudio sound server
    section: 1
  pal:
    categories:
      - Task Managers
    description: calendar with events
    section: 1
  pandoc:
    categories:
      - Conversion
    description: general markup converter
    section: 1
  paperconfig:
    categories:
      - Print
    description: configure the system default paper size
    section: 8
  par:
    categories:
      - Text Utilities
    description: filter for reformatting paragraphs
    section: 1
  par2:
    categories:
      - Backup
    description: par 2.0 compatible file verification and repair tool
    section: 1
  parallel:
    categories:
      - Pipes
    description: run programs in parallel
    section: 1
  parted:
    categories:
      - Filesystem Tools
    description: a partition manipulation program
    section: 8
  party:
    categories:
      - Funny
    description: set os responses mode
    section: 1fun
  passwd:
    categories:
      - User Management
    description: change user password
    section: 1
  paste:
    categories:
      - Text Utilities
    description: append/merge columns
    section: 1
  patch:
    categories:
      - File Compare
    description: apply a diff file to an original
    section: 1
  patchwork:
    categories:
      - Vector Graphics
    description: filter for tree maps
    section: 1
  pathchk:
    categories:
      - Files
    description: check whether file names are valid or portable
    section: 1
  patool:
    categories:
      - Compression
    description: portable archive file manager
    section: 1
  pax:
    categories:
      - Compression
    description: portable archive interchange
    section: 1
  pbzip2:
    categories:
      - Compression
    description: parallel bzip2 file compressor
    section: 1
  pcal:
    categories:
      - Date and Time
    description: generate postscript or html calendars
    section: 1
  pcapdump:
    categories:
      - Network Capture
    description: dedicated packet capture utility
    section: 1
  pcapip:
    categories:
      - Network Capture
    description: filter a pcap for ip addresses
    section: 1
  pcappick:
    categories:
      - Network Capture
    description: pick specific frames out of a pcap file by number
    section: 1
  pcapuc:
    categories:
      - Network Capture
    description: filter a pcap for ip addresses
    section: 1
  pchar:
    categories:
      - Performances
      - Network
    description: perform network measurements along an internet path
    section: 8
  pcrepattern:
    categories:
      - Interesting Pages
    description: 'pcre - perl-compatible regular expressions'
    section: 3
  pcresyntax:
    categories:
      - Interesting Pages
    description: 'pcre - perl-compatible regex syntax summary'
    section: 3
  pdffonts:
    categories:
      - Publishing
    description: pdf font analyzer
    section: 1
  pdfimages:
    categories:
      - Publishing
    description: pdf image extractor
    section: 1
  pdfinfo:
    categories:
      - Publishing
    description: pdf document information extractor
    section: 1
  pdfjam:
    categories:
      - Publishing
    description: a shell script for manipulating pdf files
    section: 1
  pdfseparate:
    categories:
      - Publishing
    description: pdf page extractor
    section: 1
  pdftex:
    categories:
      - Publishing
    description: pdf output from tex
    section: 1
  pdftk:
    categories:
      - Publishing
    description: a handy tool for manipulating pdf
    section: 1
  pdftocairo:
    categories:
      - Publishing
    description: pdf to png/jpeg/pdf/ps/eps/svg using cairo
    section: 1
  pdftohtml:
    categories:
      - Publishing
    description: 'program to convert pdf files into html, xml and png'
    section: 1
  pdftoppm:
    categories:
      - Publishing
    description: pdf to portable pixmap (ppm) converter
    section: 1
  pdftops:
    categories:
      - Publishing
    description: pdf to postscript converter
    section: 1
  pdftotext:
    categories:
      - Publishing
    description: pdf to text converter
    section: 1
  pdfunite:
    categories:
      - Publishing
    description: pdf page merger
    section: 1
  pdksh:
    categories:
      - Shells
    description: legacy kornshell built on mksh
    section: 1
  pee:
    categories:
      - Pipes
    description: tee standard input to pipes
    section: 1
  people:
    categories:
      - Funny
    description: fetch a list of all ttys behaving like a human
    section: 2fun
  pepper:
    categories:
      - Development
    description: repository statistics and report tool
    section: 1
  perf:
    categories:
      - Performances
      - Debugging
    description: performance analysis tools for linux
    section: 1
  perf-list:
    categories:
      - Debugging
    description: list all symbolic event types
    section: 1
  perf-stat:
    categories:
      - Debugging
    description: run a command and gather performance counter statistics
    section: 1
  perf-top:
    categories:
      - System
    description: system profiling tool
    section: 1
  perl:
    categories:
      - Development
    description: the perl language interpreter
    section: 1
  perlbug:
    categories:
      - Development
    description: how to submit bug reports on perl
    section: 1
  perlcheat:
    categories:
      - Interesting Pages
    description: perl 5 cheat sheet
    section: 1
  perlcritic:
    categories:
      - Development
    description: command-line interface to critique perl source
    section: 1
  perldoc:
    categories:
      - Development
    description: look up perl documentation in pod format
    section: 1
  perlintro:
    categories:
      - Interesting Pages
    description: brief introduction and overview of perl
    section: 1
  perltidy:
    categories:
      - Development
    description: a perl script indenter and reformatter
    section: 1
  pg:
    categories:
      - Viewers
    description: browse pagewise through text files
    section: 1
  pgrep:
    categories:
      - Processes
    description: lookup processes based on name and other attributes
    section: 1
  phantasia:
    categories:
      - Games
    description: an interterminal fantasy game
    section: 6
  photorec:
    categories:
      - Filesystem Tools
    description: 'recover lost files from hdisk, digital camera and cdrom'
    section: 8
  php:
    categories:
      - Development
    description: php command line interface cli
    section: 1
  pico:
    categories:
      - Editors
    description: simple text editor in the style of the alpine composer
    section: 1
  pidof:
    categories:
      - Processes
    description: find the process id of a running program
    section: 8
  pidstat:
    categories:
      - Processes
      - Performances
    description: report statistics for linux tasks
    section: 1
  pigz:
    categories:
      - Compression
    description: parallel compress files (gnu zip)
    section: 1
  pilot:
    categories:
      - File Managers
    description: simple file browser in the style of the alpine composer
    section: 1
  ping:
    categories:
      - Performances
      - Network
    description: check if host is reachable
    section: 8
  pkill:
    categories:
      - Processes
    description: signal processes based on name and other attributes
    section: 1
  pktstat:
    categories:
      - Network Monitor
    description: display packet activity
    section: 1
  play:
    categories:
      - Audio Players
    description: sox invoked as play outputs to the default sound device
    section: 1
  playmidi:
    categories:
      - Midi
    description: full-featured midi player using the voxware driver
    section: 1
  pmap:
    categories:
      - Debugging
    description: report memory map of a process
    section: 1
  pmidi:
    categories:
      - Midi
    description: midi file player for alsa
    section: 1
  pmsd:
    categories:
      - Funny
    description: periodically manic system daemon
    section: 8fun
  pngcrush:
    categories:
      - Images
    description: 'optimizes, or modifies, png files'
    section: 1
  pnpdump:
    categories:
      - Hardware
    description: dump isa plug-and-play devices resource information
    section: 8
  podget:
    categories:
      - Podcast
    description: simple tool to automate downloading of podcasts
    section: 7
  podracer:
    categories:
      - Podcast
    description: a podcast aggregator with bittorrent support
    section: 1
  popbugs:
    categories:
      - Getting Help
      - Setup
    description: find release critical bugs in packages used
    section: 1
  popcon-largest-unused:
    categories:
      - Setup
    description: list size of unused packages on the system
    section: 8
  popd:
    categories:
      - Directories
    description: 'sh: remove dir from stack, changes to the new top dir'
    section: 1
  popularity-contest:
    categories:
      - Setup
    description: list the most popular packages on the system
    section: 8
  pork:
    categories:
      - Chat
    description: console-based aol instant messenger & irc client
    section: 1
  posixoptions:
    categories:
      - Interesting Pages
    description: optional parts of the posix standard
    section: 7
  potrace:
    categories:
      - Vector Graphics
    description: transform bitmaps into vector graphics
    section: 1
  povray:
    categories:
      - 3D
    description: the persistence of vision ray tracer
    section: 1
  poweroff:
    categories:
      - Init and Runlevels
    description: reboot or stop the system
    section: 8
  powertop:
    categories:
      - Processes
    description: program to analyze power consumption on intel laptops
    section: 8
  ppthtml:
    categories:
      - Conversion
    description: convert powerpoint ppt files to html
    section: 1
  pr:
    categories:
      - Text Utilities
    description: convert text files for printing
    section: 1
  prename:
    categories:
      - Files
    description: renames multiple files with perl expression
    section: 1
  primes:
    categories:
      - Numbers and Math
    description: display all primes (primes.pl)
    section: 1
  primes.6:
    categories:
      - Numbers and Math
    description: generate primes
    section: 6
  printenv:
    categories:
      - Environment
    description: print all or part of environment
    section: 1
  printf:
    categories:
      - Interesting Pages
      - Other
    description: format and print data
    section: 1
  procinfo:
    categories:
      - System
    description: display system statistics gathered from /proc
    section: 8
  prtstat:
    categories:
      - Processes
    description: print statistics of a process
    section: 1
  ps:
    categories:
      - Processes
      - Performances
    description: report a snapshot of the current processes
    section: 1
  ps2ascii:
    categories:
      - Conversion
    description: ghostscript translator from postscript or pdf to ascii
    section: 1
  ps2pdf:
    categories:
      - Conversion
    description: convert postscript to pdf using ghostscript
    section: 1
  psed:
    categories:
      - Text Utilities
    description: a stream editor
    section: 1
  psql:
    categories:
      - Database
    description: postgresql interactive terminal
    section: 1
  psselect:
    categories:
      - Publishing
    description: select pages from a postscript file
    section: 1
  pstack:
    categories:
      - Debugging
    description: print a stack trace of running processes
    section: 1
  pstree:
    categories:
      - Processes
    description: display a tree of processes
    section: 1
  ptunnel:
    categories:
      - Network Tunnels
    description: tunnel tcp connections over icmp packets
    section: 8
  pushd:
    categories:
      - Directories
    description: 'sh: add directories to stack'
    section: 1
  pv:
    categories:
      - Pipes
    description: monitor the progress of data through a pipe
    section: 1
  pwd:
    categories:
      - Directories
    description: print name of current/working directory
    section: 1
  pwgen:
    categories:
      - Other
    description: generate pronounceable passwords
    section: 1
  pwsafe:
    categories:
      - Other
    description: password database utility
    section: 1
  pxz:
    categories:
      - Compression
    description: parallel lzma compressor compatible with xz
    section: 1
  pychecker:
    categories:
      - Development
    description: program to check python scripts for common mistakes
    section: 1
  pycompile:
    categories:
      - Development
    description: byte compile python source files
    section: 1
  pydf:
    categories:
      - Files
    description: report colourised filesystem disk space usage
    section: 1
  pydoc:
    categories:
      - Development
    description: the python documentation tool
    section: 1
  python:
    categories:
      - Development
    description: 'an interpreted, object-oriented programming language'
    section: 1
  pytone:
    categories:
      - Audio Players
    description: music jukebox for your audio files
    section: 1
  pytris:
    categories:
      - Games
    description: two players console tetris game
    section: 6
  qalc:
    categories:
      - Numbers and Math
    description: powerful and easy to use command line calculator
    section: 1
  qcp:
    categories:
      - Files
    description: copy files editing the names in a text editor
    section: 1
  qdbus:
    categories:
      - X Windows
    description: a communication-interface for qt-based applications
    section: 1
  qmp3check:
    categories:
      - Audio Editing
    description: check and clean mp3 streams
    section: 1
  qmp3cut:
    categories:
      - Audio Editing
    description: 'extract, delete parts of a mp3 file'
    section: 1
  qmp3info:
    categories:
      - Audio Editing
    description: show info from mp3 files
    section: 1
  qmp3join:
    categories:
      - Audio Editing
    description: join mp3 files
    section: 1
  qmp3report:
    categories:
      - Audio Editing
    description: report mp3 files and directories
    section: 1
  qmv:
    categories:
      - Files
    description: rename files editing the names in a text editor
    section: 1
  qrencode:
    categories:
      - Images
    description: encode data in a qr code as a png or eps image
    section: 1
  quelcom:
    categories:
      - Audio Editing
    description: command line editing tools for mp3 and wav files
    section: 1
  quilt:
    categories:
      - File Compare
    description: tool to manage series of patches
    section: 1
  quiz:
    categories:
      - Games
    description: random knowledge tests
    section: 6
  quota:
    categories:
      - Quota
    description: display disk usage and limits
    section: 8
  quotacheck:
    categories:
      - Quota
    description: 'scan for disk usage, create, check, repair quota files'
    section: 8
  quotaoff:
    categories:
      - Quota
    description: turn filesystem quotas off
    section: 8
  quotaon:
    categories:
      - Quota
    description: turn filesystem quotas on
    section: 8
  quvi:
    categories:
      - Network File Transfer
      - Websites
    description: query media tool for parsing flash streams url
    section: 1
  qwavcut:
    categories:
      - Audio Editing
    description: 'extract, delete parts of a wav file'
    section: 1
  qwavfade:
    categories:
      - Audio Editing
    description: fade in/out wav files
    section: 1
  qwavheaderdump:
    categories:
      - Audio Editing
    description: dump and fix wav headers
    section: 1
  qwavinfo:
    categories:
      - Audio Editing
    description: show info from wav files
    section: 1
  qwavjoin:
    categories:
      - Audio Editing
    description: join wav files
    section: 1
  qwavsilence:
    categories:
      - Audio Editing
    description: detect and shrink silence sequences in wav files
    section: 1
  r2:
    categories:
      - Debugging
    description: 'advanced hexadecimal editor, disassembler and debugger'
    section: 1
  rabin2:
    categories:
      - Debugging
    description: get information about elf/pe/mz/class
    section: 1
  radiff2:
    categories:
      - Binary Information
    description: unified binary diffing utility
    section: 1
  rafind2:
    categories:
      - Binary Information
    description: find byte patterns into files
    section: 1
  raggle:
    categories:
      - RSS Reader
    description: console rss aggregator
    section: 1
  rahash2:
    categories:
      - File Compare
      - Binary Information
    description: block based hashing utility
    section: 1
  rain:
    categories:
      - Screensavers
    description: animated raindrops display
    section: 6
  random:
    categories:
      - Interesting Pages
    description: kernel random number source devices
    section: 4
  ranger:
    categories:
      - File Managers
    description: visual file manager
    section: 1
  rar:
    categories:
      - Compression
    description: archive files with compression
    section: 1
  rarp:
    categories:
      - Network
    description: manipulate the system rarp table
    section: 8
  rarun2:
    categories:
      - Security Context
    description: run programs with different env/args/perms/dirs/etc
    section: 1
  rasm2:
    categories:
      - Development
    description: assemble and disassemble files or hexpair strings
    section: 1
  rasterizer:
    categories:
      - Vector Graphics
    description: 'svg conversion to png, jpeg and pdf'
    section: 1
  rawdog:
    categories:
      - RSS Reader
    description: rss aggregator without delusions of grandeur
    section: 1
  rax2:
    categories:
      - Numbers and Math
    description: 'convert between (signed) int, float, oct, bin and hex'
    section: 1
  rc:
    categories:
      - Shells
    description: a shell for plan 9 and unix systems
    section: 1
  rcp:
    categories:
      - Network File Transfer
    description: remote file copy
    section: 1
  rcs:
    categories:
      - Revision Control
    description: change rcs file attributes
    section: 1
  rdfind:
    categories:
      - File Find
    description: finds duplicate files
    section: 1
  rdiff:
    categories:
      - File Compare
    description: binary diff tool for signature-based differences
    section: 1
  rdist:
    categories:
      - Backup
    description: remote file distribution client program
    section: 1
  rdjpgcom:
    categories:
      - Images
    description: display text comments from a jpeg file
    section: 1
  rdup:
    categories:
      - Backup
    description: generate a file list suitable for making backups
    section: 1
  readelf:
    categories:
      - Debugging
    description: displays information about elf files
    section: 1
  readline:
    categories:
      - Interesting Pages
    description: get a line from a user with editing (inputrc)
    section: 3
  readlink:
    categories:
      - Files
    description: print value of a symbolic link or canonical file name
    section: 1
  realpath:
    categories:
      - Files
    description: print the resolved path
    section: 1
  reboot:
    categories:
      - Init and Runlevels
    description: reboot or stop the system
    section: 8
  rec:
    categories:
      - Audio Editing
    description: sox invoked as rec set default sound device as input
    section: 1
  recode:
    categories:
      - Text Utilities
      - Conversion
    description: converts files between character sets
    section: 1
  red:
    categories:
      - Text Utilities
    description: line-oriented text editor
    section: 1
  regex:
    categories:
      - Interesting Pages
    description: posix.2 regular expressions
    section: 7
  remind:
    categories:
      - Task Managers
    description: a sophisticated reminder service
    section: 1
  rename:
    categories:
      - Files
    description: rename files by replacing expressions
    section: 1
  renice:
    categories:
      - Processes
      - Performances
    description: alter priority of running processes
    section: 1
  repquota:
    categories:
      - Quota
    description: summarize quotas for a filesystem
    section: 8
  reptyr:
    categories:
      - Terminal Tools
    description: reparent a running program to a new terminal/screen
    section: 1
  rescrog:
    categories:
      - Funny
    description: 'change something, make it different'
    section: 1fun
  reset:
    categories:
      - Terminal Tools
    description: terminal initialization
    section: 1
  restore:
    categories:
      - Backup
    description: restore files or filesystem from backups made with dump
    section: 8
  rev:
    categories:
      - Viewers
      - Text Utilities
    description: reverse characters of lines in file or files
    section: 1
  rexima:
    categories:
      - Hardware
    description: a curses-based (and command-line) mixer
    section: 1
  rfcdiff:
    categories:
      - File Compare
    description: compare rfcs or internet drafts or any other text files
    section: 1
  rgrep:
    categories:
      - Text Utilities
    description: print lines matching a pattern recursively (-r)
    section: 1
  rhash:
    categories:
      - File Compare
    description: 'print or check ed2k, bittorrent, dc++, and other hashes'
    section: 1
  rifle:
    categories:
      - Binary Information
    description: ranger's file opener with special file type checking
    section: 1
  rig:
    categories:
      - Other
    description: random identity generator
    section: 6
  ripit:
    categories:
      - CD/DVD/BluRay
    description: make flac/ogg/mp3/m4a/aac/als/mp4/mpc/wv/etc from cd
    section: 1
  rlogin:
    categories:
      - Network Apps
    description: openssh ssh client (remote login program)
    section: 1
  rm:
    categories:
      - Files
    description: remove files or directories
    section: 1
  rmdir:
    categories:
      - Directories
    description: remove empty directories
    section: 1
  rmmod:
    categories:
      - Kernel
    description: simple program to remove a module from the linux kernel
    section: 8
  rmtpdump:
    categories:
      - Network File Transfer
    description: rtmp streaming media client
    section: 1
  robots:
    categories:
      - Games
    description: fight off villainous robots
    section: 6
  rogue:
    categories:
      - Games
    description: exploring the dungeons of doom
    section: 6
  route:
    categories:
      - Network
    description: show/manipulate the ip routing table
    section: 8
  rpm:
    categories:
      - Setup
    description: rpm package manager (redhat)
    section: 8
  rrdtool:
    categories:
      - Database
    description: round robin database tool and grapher
    section: 1
  rs:
    categories:
      - Text Utilities
    description: reshape a data array
    section: 1
  rsh:
    categories:
      - Network Apps
    description: remote shell
    section: 1
  rsstail:
    categories:
      - RSS Reader
    description: console based rss news reader
    section: 1
  rst2pdf:
    categories:
      - Conversion
    description: convert restructuredtext documents to pdf
    section: 1
  rsync:
    categories:
      - Backup
    description: 'a fast, versatile, remote (and local) file-copying tool'
    section: 1
  rsyncrypto:
    categories:
      - Encryption
      - Backup
    description: rsync friendly encryption
    section: 1
  rtfm:
    categories:
      - Funny
    description: a response for easy questions from clueless lusers
    section: 1fun
  rtorrent:
    categories:
      - Network File Transfer
    description: a bittorrent client for ncurses
    section: 1
  ruby:
    categories:
      - Development
    description: interpreted object-oriented scripting language
    section: 1
  runcon:
    categories:
      - Security Context
    description: run command with specified security context (selinux)
    section: 1
  runlevel:
    categories:
      - Init and Runlevels
    description: output previous and current runlevel
    section: 8
  rwho:
    categories:
      - User Information
    description: determine all users logged on your local network
    section: 1
  s2p:
    categories:
      - Text Utilities
    description: sed to perl translator
    section: 1
  sa:
    categories:
      - User Information
    description: summarizes accounting information
    section: 8
  safecopy:
    categories:
      - Filesystem Tools
    description: data recovery tool
    section: 1
  saidar:
    categories:
      - System
    description: a curses-based tool for viewing system statistics
    section: 1
  sail:
    categories:
      - Games
    description: multi-user wooden ships and iron men
    section: 6
  sar:
    categories:
      - System
      - Performances
    description: 'collect, report, or save system activity information'
    section: 1
  saydate:
    categories:
      - Date and Time
      - Text to Speech
    description: audio date/uptime check
    section: 1
  saytime:
    categories:
      - Date and Time
      - Text to Speech
    description: audio time check
    section: 1
  sc:
    categories:
      - Numbers and Math
      - Office
    description: spreadsheet calculator
    section: 1
  scanimage:
    categories:
      - Images
    description: scan an image
    section: 1
  scanmem:
    categories:
      - Debugging
    description: locate and modify a variable in an executing process
    section: 1
  scapy:
    categories:
      - Network Scan
      - Network Capture
    description: interactive packet manipulation tool
    section: 1
  schroot:
    categories:
      - Security Context
    description: securely enter a chroot environment
    section: 1
  scp:
    categories:
      - Network File Transfer
    description: securely copy files between hosts
    section: 1
  screen:
    categories:
      - Terminal Tools
    description: screen manager with vt100/ansi terminal emulation
    section: 1
  screenfetch:
    categories:
      - ASCII Art
    description: the bash screenshot information tool
    section: 1
  script:
    categories:
      - Terminal Tools
    description: make typescript of terminal session
    section: 1
  scriptreplay:
    categories:
      - Terminal Tools
    description: 'play back typescripts, using timing information'
    section: 1
  scrypt:
    categories:
      - Encryption
    description: encrypt or decrypt files
    section: 1
  scsiinfo:
    categories:
      - Hardware
    description: query information from a scsi device
    section: 8
  sdcv:
    categories:
      - Spelling
    description: console version of stardict program
    section: 1
  sdiff:
    categories:
      - File Compare
    description: side-by-side merge of file differences
    section: 1
  sed:
    categories:
      - Text Utilities
    description: stream editor for filtering and transforming text
    section: 1
  sendfax:
    categories:
      - Modem/Fax/GSM
    description: submit a facsimile job for transmission
    section: 1
  sendpage:
    categories:
      - Modem/Fax/GSM
    description: submit a pager job for transmission
    section: 1
  seq:
    categories:
      - Numbers and Math
    description: print a sequence of numbers
    section: 1
  service:
    categories:
      - Init and Runlevels
    description: run a system v init script
    section: 8
  setfacl:
    categories:
      - File Attributes
    description: set file access control lists
    section: 1
  setfattr:
    categories:
      - File Attributes
    description: set extended attributes of filesystem objects
    section: 1
  setleds:
    categories:
      - Hardware
    description: set the keyboard leds
    section: 1
  setpci:
    categories:
      - Hardware
    description: configure pci devices
    section: 8
  setquota:
    categories:
      - Quota
    description: set disk quotas
    section: 8
  setserial:
    categories:
      - Hardware
    description: get/set linux serial port information
    section: 8
  setsid:
    categories:
      - Processes
    description: run a program in a new session
    section: 1
  setterm:
    categories:
      - Terminal Tools
    description: set terminal attributes
    section: 1
  setuid:
    categories:
      - Processes
    description: run a command with a different uid
    section: 1
  setxkbmap:
    categories:
      - X Windows
    description: set the keyboard using the x keyboard extension
    section: 1
  sex:
    categories:
      - Funny
    description: have sex
    section: 6fun
  sfdp:
    categories:
      - Vector Graphics
    description: filter for drawing large undirected graphs
    section: 1
  sftp:
    categories:
      - Network File Transfer
    description: secure file transfer program
    section: 1
  sg_map:
    categories:
      - Hardware
    description: displays mapping between linux sg and scsi devices
    section: 8
  sginfo:
    categories:
      - Hardware
    description: access mode page information for a scsi/atapi device
    section: 8
  sgml2latex:
    categories:
      - Conversion
    description: 'create latex, dvi, ps or pdf output from an sgml file'
    section: 1
  sgrep:
    categories:
      - Text Utilities
    description: search a file for a structured pattern
    section: 1
  sh:
    categories:
      - Shells
    description: 'shell, the standard command language interpreter'
    section: 1
  shar:
    categories:
      - Compression
    description: create shell archives
    section: 1
  shasum:
    categories:
      - File Compare
    description: print or check sha checksums
    section: 1
  shell-fm:
    categories:
      - Websites
      - Audio Players
    description: console-based player for last.fm radio streams
    section: 1
  shellcheck:
    categories:
      - Shells
    description: analyzes shell scripts and points out typical issues
    section: 1
  showkey:
    categories:
      - Hardware
    description: examine the codes sent by the keyboard
    section: 1
  showmount:
    categories:
      - Network Filesystems
    description: show mount information for an nfs server
    section: 8
  shred:
    categories:
      - Files
    description: 'overwrite a file to hide its contents, and delete it'
    section: 1
  shuf:
    categories:
      - Text Utilities
    description: write a random permutation of the input lines to stdout
    section: 1
  shush:
    categories:
      - Schedule
    description: run a command and optionally report its output by mail
    section: 1
  shutdown:
    categories:
      - Init and Runlevels
    description: shutdown or restart the system
    section: 8
  sic:
    categories:
      - Chat
    description: 'an extremly fast, small and simple irc client'
    section: 1
  siege:
    categories:
      - Performances
    description: an http/https stress tester
    section: 1
  signal:
    categories:
      - Interesting Pages
    description: overview of signals
    section: 7
  simple-scan:
    categories:
      - Images
    description: scanning utility
    section: 1
  since:
    categories:
      - Text Utilities
    description: display content of a file since the last time
    section: 1
  sipcalc:
    categories:
      - Network
    description: ip subnet calculator
    section: 1
  skill:
    categories:
      - Processes
    description: send a signal or report process status
    section: 1
  slabtop:
    categories:
      - System
      - Performances
    description: display kernel slab cache information in real time
    section: 1
  slashem:
    categories:
      - Games
    description: exploring the mazes of menace
    section: 6
  slave:
    categories:
      - Funny
    description: a semi-interactive command for the dirty work
    section: 1fun
  sleep:
    categories:
      - Schedule
    description: wait for some time
    section: 1
  sln:
    categories:
      - Files
    description: link files (statically linked)
    section: 8
  sloccount:
    categories:
      - Development
    description: count source lines of code (sloc)
    section: 1
  slrn:
    categories:
      - Newsgroups
    description: an easy to use nntp / spool based newsreader
    section: 1
  slsc:
    categories:
      - Office
    description: s-langauge port of the sc spreadsheet
    section: 1
  slurm:
    categories:
      - Network Monitor
    description: yet another network load monitor
    section: 1
  smart:
    categories:
      - Setup
    description: the smart package manager (apt/rpm/yum/etc)
    section: 8
  smartctl:
    categories:
      - Hardware
    description: control and monitor utility for smart disks
    section: 8
  smbclient:
    categories:
      - Network
    description: ftp-like client to access smb/cifs resources on servers
    section: 1
  snake:
    categories:
      - Games
    description: display chase game
    section: 6
  snd:
    categories:
      - Audio Editing
    description: a sound editor
    section: 1
  snice:
    categories:
      - Processes
    description: send a signal or report process status
    section: 1
  sniffit:
    categories:
      - Network Capture
    description: packet sniffer and monitoring tool
    section: 8
  snmpcmd:
    categories:
      - Network
    description: behaviour common to most of the net-snmp commands
    section: 1
  snmpget:
    categories:
      - Performances
      - Network
    description: communicates with a network using snmp get requests
    section: 1
  snmpwalk:
    categories:
      - Network
    description: retrieve a management values subtree using snmp getnext
    section: 1
  snort:
    categories:
      - Network Capture
    description: packet sniffer/logger and intrusion detection system
    section: 8
  snownews:
    categories:
      - RSS Reader
    description: console rss newsreader
    section: 1
  sntop:
    categories:
      - Network Monitor
    description: top-like console network status tool
    section: 1
  socat:
    categories:
      - Network
      - Network File Transfer
    description: multipurpose relay (socket cat)
    section: 1
  socklist:
    categories:
      - Performances
    description: display list of open sockets
    section: 8
  sockstat:
    categories:
      - Performances
    description: list open sockets
    section: 8
  sort:
    categories:
      - Text Utilities
    description: sort lines of text files
    section: 1
  sox:
    categories:
      - Audio and Music
      - Audio Editing
    description: the swiss army knife of audio manipulation
    section: 1
  spc:
    categories:
      - Viewers
    description: colorizes text for terminals and html (supercat)
    section: 1
  speedometer:
    categories:
      - Network Monitor
    description: display the rate of data across a network connection
    section: 1
  spell:
    categories:
      - Spelling
    description: check spelling in batch
    section: 1
  splay:
    categories:
      - Audio Players
    description: 'mpeg-1,2 audio layer 1,2,3 file player'
    section: 1
  split:
    categories:
      - Text Utilities
    description: split a file into fixed-size pieces
    section: 1
  sponge:
    categories:
      - Pipes
    description: soaks up all standard input and write to a file after
    section: 1
  sq:
    categories:
      - Text Utilities
    description: squeeze a sorted word list
    section: 1
  sql:
    categories:
      - Database
    description: execute a command on a database determined by a dburl
    section: 1
  sqlite:
    categories:
      - Database
    description: a command line interface for sqlite
    section: 1
  sqlite3:
    categories:
      - Database
    description: command line interface for sqlite version 3
    section: 1
  ss:
    categories:
      - Performances
      - Network
    description: another utility to investigate sockets
    section: 8
  ssconvert:
    categories:
      - Office
      - Conversion
    description: spreadsheet format converter (gnumeric)
    section: 1
  ssdiff:
    categories:
      - Office
    description: compare two spreadsheets
    section: 1
  ssgrep:
    categories:
      - Office
    description: search spreadsheets for strings
    section: 1
  ssh:
    categories:
      - Network Apps
    description: openssh ssh client (remote login program)
    section: 1
  ssh-copy-id:
    categories:
      - Network Apps
    description: install public key in a remote machine authorized_keys
    section: 1
  ssh-keygen:
    categories:
      - Network Apps
    description: 'authkey generation, management and conversion'
    section: 1
  sshfs:
    categories:
      - Network Filesystems
    description: filesystem client based on ssh
    section: 1
  sshmitm:
    categories:
      - Network
    description: ssh monkey-in-the-middle
    section: 8
  sshow:
    categories:
      - Network
    description: ssh traffic analysis tool
    section: 8
  ssindex:
    categories:
      - Office
    description: generate index data for spreadsheet files
    section: 1
  sslscan:
    categories:
      - Network Scan
    description: fast ssl scanner
    section: 1
  standards:
    categories:
      - Interesting Pages
    description: 'standards - c and unix standards'
    section: 7
  stap:
    categories:
      - Performances
      - Debugging
    description: systemtap script translator driver
    section: 1
  start:
    categories:
      - Init and Runlevels
    description: init daemon control tool
    section: 8
  stat:
    categories:
      - File Attributes
    description: display file attributes or file system status
    section: 1
  status:
    categories:
      - Init and Runlevels
    description: init daemon control tool
    section: 8
  stdbuf:
    categories:
      - Pipes
    description: run command with modified buffering for its stdstreams
    section: 1
  stegbreak:
    categories:
      - Encryption
    description: launches brute-force dictionary attacks on jpg image
    section: 1
  stegdetect:
    categories:
      - Encryption
    description: finds image files with steganographic content
    section: 1
  steghide:
    categories:
      - Encryption
    description: a steganography program
    section: 1
  stop:
    categories:
      - Init and Runlevels
    description: init daemon control tool
    section: 8
  stow:
    categories:
      - Setup
      - Files
    description: software package installation manager (with symlinks)
    section: 8
  strace:
    categories:
      - Performances
      - Debugging
    description: trace system calls and signals
    section: 1
  strfry:
    categories:
      - Funny
    description: string operation
    section: 3fun
  strftime:
    categories:
      - Interesting Pages
    description: format date and time
    section: 3
  strings:
    categories:
      - Debugging
    description: extract printable strings
    section: 1
  strip:
    categories:
      - Development
    description: remove unnecessary information from executable files
    section: 1
  stty:
    categories:
      - Terminal Tools
    description: change and print terminal line settings
    section: 1
  stunnel:
    categories:
      - Network Tunnels
      - Encryption
    description: universal ssl tunnel
    section: 8
  stx2any:
    categories:
      - Conversion
    description: converter from structured text to multiple formats
    section: 1
  su:
    categories:
      - Security Context
    description: change user id or become superuser
    section: 1
  subnetcalc:
    categories:
      - Network
    description: ipv4/ipv6 subnet calculator
    section: 8
  sudo:
    categories:
      - Security Context
    description: execute a command as another user
    section: 8
  sudoedit:
    categories:
      - Security Context
    description: edit one or more files as another user
    section: 8
  sum:
    categories:
      - File Compare
    description: checksum and count the blocks in a file
    section: 1
  surfraw:
    categories:
      - Browser
    description: fast search/bookmarks access to various www clients
    section: 1
  suricata:
    categories:
      - Network
    description: next generation intrusion detection and prevention tool
    section: 8
  svn:
    categories:
      - Revision Control
    description: subversion command line client tool
    section: 1
  swapoff:
    categories:
      - System
    description: disable devices and files for paging and swapping
    section: 8
  swapon:
    categories:
      - System
      - Performances
    description: enable/disable device and file for paging and swapping
    section: 8
  swatch:
    categories:
      - System
    description: simple watcher
    section: 1p
  synaptic:
    categories:
      - Setup
    description: graphical management of software packages (xwindows)
    section: 8
  sync:
    categories:
      - Filesystem Tools
    description: flush disk caches
    section: 8
  sysadmin:
    categories:
      - Funny
    description: responsible for everything imaginable
    section: 1fun
  sysbench:
    categories:
      - System
      - Performances
    description: 'a modular, multi-threaded benchmark tool'
    section: 1
  sysctl:
    categories:
      - Kernel
      - Performances
    description: configure kernel parameters at runtime
    section: 8
  sysdig:
    categories:
      - Performances
      - Debugging
    description: a system-level exploration and troubleshooting tool
    section: 8
  systemctl:
    categories:
      - Init and Runlevels
    description: control the systemd system and service manager
    section: 1
  sysv-rc-conf:
    categories:
      - Init and Runlevels
    description: run-level configuration for sysv like init script links
    section: 8
  tabs:
    categories:
      - Terminal Tools
    description: set terminal tabs
    section: 1
  tac:
    categories:
      - Viewers
      - Viewers
      - Text Utilities
    description: concatenate and print files in reverse
    section: 1
  tail:
    categories:
      - Text Utilities
    description: output the last 10 lines of file
    section: 1
  talk:
    categories:
      - User Information
      - Chat
    description: talk to another user
    section: 1
  tar:
    categories:
      - Compression
      - Backup
    description: read write tape archives
    section: 1
  tarsnap:
    categories:
      - Backup
    description: manipulate remote encrypted backups
    section: 1
  task:
    categories:
      - Task Managers
    description: 'taskwarrior, a command line todo manager'
    section: 1
  taskset:
    categories:
      - Processes
      - Performances
    description: retrieve or set a process cpu affinity
    section: 1
  tbl:
    categories:
      - Conversion
    description: format tables for troff
    section: 1
  tc:
    categories:
      - Network
    description: show/manipulate traffic control settings
    section: 8
  tcpdump:
    categories:
      - Performances
      - Network Capture
    description: dump traffic on a network
    section: 8
  tcpflow:
    categories:
      - Network Capture
    description: tcp flow recorder
    section: 1
  tcpick:
    categories:
      - Network Capture
    description: tcp stream sniffer and connection tracker
    section: 8
  tcpkill:
    categories:
      - Network
    description: kill tcp connections on a lan
    section: 8
  tcpnice:
    categories:
      - Network
    description: slow down tcp connections on a lan
    section: 8
  tcpreen:
    categories:
      - Network Monitor
    description: tcp stream monitoring tool
    section: 1
  tcpspy:
    categories:
      - Network Capture
    description: tcp/ip connection monitor
    section: 8
  tcptrace:
    categories:
      - Network Capture
    description: a tcp connection analysis tool
    section: 1
  tcptrack:
    categories:
      - Network Monitor
    description: monitor tcp connections on the network
    section: 1
  tcsh:
    categories:
      - Shells
    description: c shell with file name completion and cli editing
    section: 1
  tdl:
    categories:
      - Task Managers
    description: to do list manager
    section: 1
  teapot:
    categories:
      - Office
    description: table editor and planner
    section: 1
  tee:
    categories:
      - Pipes
      - Text Utilities
    description: copy stdin to a file and to stdout simultaneously
    section: 1
  telinit:
    categories:
      - Init and Runlevels
    description: change system runlevel
    section: 8
  telnet:
    categories:
      - Network Apps
    description: log into remote hosts
    section: 1
  terminfo:
    categories:
      - Interesting Pages
    description: terminal capability data base
    section: 5
  tesseract:
    categories:
      - Images
    description: command-line ocr engine
    section: 1
  test:
    categories:
      - File Attributes
    description: check file types and compare values
    section: 1
  tetheral:
    categories:
      - Network Capture
    description: dump and analyze network traffic
    section: 1
  tetris-bsd:
    categories:
      - Games
    description: the game of tetris
    section: 6
  tex:
    categories:
      - Publishing
    description: text formatting and typesetting
    section: 1
  textfmt:
    categories:
      - Modem/Fax/GSM
      - Conversion
    description: convert ascii text to postscript for facsimile
    section: 1
  think:
    categories:
      - Funny
    description: 'you dont have to think, computers can think for you'
    section: 1fun
  tic:
    categories:
      - Terminal Tools
    description: the terminfo entry-description compiler
    section: 1
  tidy:
    categories:
      - Development
    description: 'validate, correct, and pretty-print html files'
    section: 1
  tig:
    categories:
      - Revision Control
    description: text-mode interface for git
    section: 1
  time:
    categories:
      - Processes
    description: time a simple command
    section: 1
  timeout:
    categories:
      - Processes
      - Schedule
    description: run a command with a time limit
    section: 1
  times:
    categories:
      - System
    description: show process times for the shell and its child
    section: 1
  timidity:
    categories:
      - Midi
    description: midi-to-wave converter and player
    section: 1
  tin:
    categories:
      - Newsgroups
    description: usenet newsreader
    section: 1
  tinyirc:
    categories:
      - Chat
    description: basic irc commands and an curses-based interface
    section: 1
  tiptop:
    categories:
      - Performances
      - Debugging
    description: display hardware performance counters for linux tasks
    section: 1
  tircd:
    categories:
      - Chat
      - Websites
    description: an ircd proxy to the twitter api
    section: 1
  tload:
    categories:
      - System
    description: graphic representation of system load average
    section: 1
  tm:
    categories:
      - Funny
    description: meditate
    section: 1fun
  tmux:
    categories:
      - Terminal Tools
    description: terminal multiplexer
    section: 1
  todo.sh:
    categories:
      - Task Managers
    description: 'minimal, todo.txt focused task manager'
    section: 1
  toe:
    categories:
      - Terminal Tools
    description: table of (terminfo) entries
    section: 1
  toilet:
    categories:
      - ASCII Art
    description: display large colourful characters
    section: 1
  top:
    categories:
      - Processes
      - Performances
    description: monitor processes
    section: 1
  touch:
    categories:
      - Files
      - File Attributes
    description: change file timestamps
    section: 1
  tpp:
    categories:
      - Office
    description: text presentation program
    section: 1
  tput:
    categories:
      - Terminal Tools
    description: change terminal characteristics
    section: 1
  tr:
    categories:
      - Text Utilities
    description: 'translate, squeeze or delete characters'
    section: 1
  trace-cmd:
    categories:
      - Debugging
    description: interacts with ftrace linux kernel internal tracer
    section: 1
  trace-cmd-list:
    categories:
      - Debugging
    description: 'list available plugins, events or options for ftrace'
    section: 1
  tracepath:
    categories:
      - Network
    description: 'traces path to a network host, discovering mtu along'
    section: 8
  traceroute:
    categories:
      - Performances
      - Network
    description: print the route packets trace to network host (see mtr)
    section: 8
  trafshow:
    categories:
      - Network Monitor
    description: full screen show network traffic
    section: 1
  trash:
    categories:
      - Files
      - X Windows
    description: trash utility compliant with freedesktop.org
    section: 1
  trash-empty:
    categories:
      - Files
      - X Windows
    description: empty for command line trash utility
    section: 1
  trash-list:
    categories:
      - Files
      - X Windows
    description: list trashed files
    section: 1
  trash-restore:
    categories:
      - Files
      - X Windows
    description: restore for command line trash utility
    section: 1
  tree:
    categories:
      - Directories
      - Files
    description: list contents of directories in a tree-like format
    section: 1
  trek:
    categories:
      - Games
    description: trekkie game
    section: 6
  trickle:
    categories:
      - Network File Transfer
    description: a lightweight userspace bandwidth shaper
    section: 1
  trn:
    categories:
      - Newsgroups
    description: threaded read news program
    section: 1
  troff:
    categories:
      - Conversion
    description: the troff processor of the groff text formatting system
    section: 1
  true:
    categories:
      - Other
    description: 'do nothing, successfully'
    section: 1
  truncate:
    categories:
      - Files
      - Text Utilities
    description: shrink/extend the size of a file to the specified size
    section: 1
  ts:
    categories:
      - Pipes
    description: timestamp input
    section: 1
  tshark:
    categories:
      - Network Capture
    description: dump and analyze network traffic
    section: 1
  tsort:
    categories:
      - Text Utilities
    description: perform topological sort
    section: 1
  tsung:
    categories:
      - Performances
    description: distributed multi-protocol load testing tool
    section: 1
  ttm:
    categories:
      - Conversion
    description: tex/latex to mathml converter
    section: 1
  tty:
    categories:
      - Terminal Tools
    description: display the name of the terminal connected to stdin
    section: 1
  tty-clock:
    categories:
      - Screensavers
    description: a terminal digital clock
    section: 1
  ttyplay:
    categories:
      - Terminal Tools
    description: player of the tty session recorded by ttyrec
    section: 1
  ttyrec:
    categories:
      - Terminal Tools
    description: a tty recorder
    section: 1
  tudu:
    categories:
      - Task Managers
    description: command line hierarchical todo list
    section: 1
  tune2fs:
    categories:
      - Filesystem Tools
      - Performances
    description: adjust tunable filesystem parameters on ext2/ext3/ext4
    section: 8
  tweak:
    categories:
      - Binary Information
    description: efficient hex editor
    section: 1
  twidge:
    categories:
      - Websites
    description: 'microblogging client for twitter, identica'
    section: 1
  twin:
    categories:
      - Terminal Tools
    description: textmode window environment
    section: 1
  twopi:
    categories:
      - Vector Graphics
    description: filter for radial layouts of graphs
    section: 1
  twyt:
    categories:
      - Websites
    description: command line twitter client
    section: 1
  txt2html:
    categories:
      - Conversion
    description: convert plain text file to html
    section: 1
  txt2man:
    categories:
      - Conversion
    description: convert flat ascii text to man page format
    section: 1
  txt2pdbdoc:
    categories:
      - Conversion
    description: text to doc file converter for palm pilots
    section: 1
  txt2regex:
    categories:
      - Development
    description: a regular expression wizard
    section: 1
  txt2tags:
    categories:
      - Conversion
    description: text formatting and conversion tool
    section: 1
  type:
    categories:
      - Getting Help
    description: display information about command type
    section: 1
  uchardet:
    categories:
      - Text Utilities
    description: universalchardet (universal charset detector)
    section: 1
  udevadm:
    categories:
      - Hardware
    description: udev management tool
    section: 8
  udptunnel:
    categories:
      - Network Tunnels
    description: tunnel udp packets over a tcp connection
    section: 1
  ufw:
    categories:
      - Network
    description: program for managing a netfilter firewall
    section: 8
  umask:
    categories:
      - File Attributes
    description: set default file protections
    section: 1
  umount:
    categories:
      - Filesystem Tools
    description: unmount file systems
    section: 8
  unaccent:
    categories:
      - Text Utilities
    description: remove accents from input stream or a string
    section: 1
  unace:
    categories:
      - Compression
    description: 'extract, test and view ace archives'
    section: 1
  uname:
    categories:
      - System
    description: print system/kernel information
    section: 1
  uncompress:
    categories:
      - Compression
    description: expand files
    section: 1
  uncrustify:
    categories:
      - Development
    description: 'c, c++, c#, d, java and pawn source code beautifier'
    section: 1
  undocumented.3:
    categories:
      - Interesting Pages
    description: undocumented library functions
    section: 3
  undocumented.7:
    categories:
      - Interesting Pages
    description: 'no manpage for this program, utility or function'
    section: 7
  unexpand:
    categories:
      - Text Utilities
    description: convert spaces to tabs
    section: 1
  unhtml:
    categories:
      - Conversion
    description: strip the html formatting
    section: 1
  unicode:
    categories:
      - Interesting Pages
    description: universal character set
    section: 7
  unify:
    categories:
      - File Compare
    description: 'transforms context diffs into unidiffs, or vice-versa'
    section: 1
  uniq:
    categories:
      - Text Utilities
    description: report or omit repeated lines
    section: 1
  unison:
    categories:
      - Backup
    description: user level file-synchronization tool
    section: 1
  units:
    categories:
      - Numbers and Math
    description: convert units from one scale to another
    section: 1
  units.7:
    categories:
      - Interesting Pages
    description: 'units, kilo/kibi/mega, decimal and binary prefixes'
    section: 7
  unlink:
    categories:
      - Files
    description: call the unlink function to remove the specified file
    section: 1
  unoconv:
    categories:
      - Conversion
    description: convert documents from/to libreoffice format
    section: 1
  unpigz:
    categories:
      - Compression
    description: parallel decompress files (gnu zip)
    section: 1
  unrar:
    categories:
      - Compression
    description: extract files from rar archives
    section: 1
  unshar:
    categories:
      - Compression
    description: unpack a shar file
    section: 1
  unsort:
    categories:
      - Text Utilities
    description: reorder lines in a file in semirandom ways
    section: 1
  unsq:
    categories:
      - Text Utilities
    description: unsqueeze a sorted word list
    section: 1
  update-alternatives:
    categories:
      - Setup
    description: maintain symlinks for default commands
    section: 8
  update-manager:
    categories:
      - Setup
    description: graphical management of software updates
    section: 8
  updatedb:
    categories:
      - File Find
    description: update a database for m/slocate
    section: 8
  uptime:
    categories:
      - System
      - Performances
    description: view the system load and how long it has been running
    section: 1
  urlscan:
    categories:
      - EMail
    description: browse the urls in an email message from a terminal
    section: 1
  urlview:
    categories:
      - Text Utilities
    description: url extractor/launcher (see urlscan for mails)
    section: 1
  urpmi:
    categories:
      - Setup
    description: rpm downloader/installer/dependency solver (mandriva)
    section: 1
  useradd:
    categories:
      - User Management
    description: create a new user or update default user information
    section: 8
  userdel:
    categories:
      - User Management
    description: delete a user account and related files
    section: 8
  usermod:
    categories:
      - User Management
    description: modify a user account
    section: 8
  users:
    categories:
      - User Information
    description: print the user names of users currently logged in
    section: 1
  utf8tolatin1:
    categories:
      - Conversion
    description: reads utf-8 encoded text and writes latin1
    section: 1
  uubp:
    categories:
      - Funny
    description: unix-to-unix beer protocol
    section: 1fun
  uucp:
    categories:
      - Network File Transfer
    description: system-to-system copy
    section: 1
  uudecode:
    categories:
      - Compression
    description: decode a file created by uuencode
    section: 1
  uuencode:
    categories:
      - Compression
    description: encode a binary file
    section: 1
  uustat:
    categories:
      - Processes
      - Network Apps
    description: uucp status inquiry and job control
    section: 1
  uux:
    categories:
      - Processes
      - Network Apps
    description: remote command execution
    section: 1
  vbackup:
    categories:
      - Backup
    description: a modular backup program
    section: 8
  vdir:
    categories:
      - Files
    description: verbosely list directory contents
    section: 1
  venti:
    categories:
      - Backup
    description: client for sha1-addressed block storage server
    section: 1
  vfu:
    categories:
      - File Managers
    description: text-mode file manager for unix/linux
    section: 1
  vi:
    categories:
      - Editors
    description: text editor
    section: 1
  vidir:
    categories:
      - Files
    description: edit a directory in your text editor
    section: 1
  vifm:
    categories:
      - File Managers
    description: a ncurses based file manager with vi like keybindings
    section: 1
  vilistextum:
    categories:
      - Conversion
    description: html to ascii converter
    section: 1
  vim:
    categories:
      - Editors
    description: text editor
    section: 1
  vipe:
    categories:
      - Pipes
    description: insert a text editor into a pipe
    section: 1
  vlc:
    categories:
      - Videos
      - Audio and Music
      - Audio Players
    description: 'video lan client, a media player/streamer/transcoder'
    section: 1
  vmstat:
    categories:
      - System
      - Performances
    description: report virtual memory statistics
    section: 8
  vnstat:
    categories:
      - Network Monitor
    description: a console-based network traffic monitor
    section: 1
  w:
    categories:
      - Processes
      - User Information
    description: show who is logged on and what they are doing
    section: 1
  w2do:
    categories:
      - Task Managers
    description: a simple text-based todo manager
    section: 1
  w3m:
    categories:
      - Browser
    description: a text based web browser and pager
    section: 1
  wait:
    categories:
      - Schedule
    description: await process completion
    section: 1
  wall:
    categories:
      - User Information
      - Chat
    description: write a message to users
    section: 1
  wargames:
    categories:
      - Games
    description: shall we play a game?
    section: 6
  watch:
    categories:
      - Schedule
    description: 'execute a program periodically, showing output'
    section: 1
  wavemon:
    categories:
      - Wireless
      - Network Monitor
    description: a wireless network monitor
    section: 1
  wc:
    categories:
      - Text Utilities
    description: 'print newline, word, and byte counts for each file'
    section: 1
  wcalc:
    categories:
      - Numbers and Math
    description: a natural-expression command-line calculator
    section: 1
  wdiff:
    categories:
      - File Compare
    description: display word differences between text files
    section: 1
  weather:
    categories:
      - Websites
    description: obtain weather conditions and forecasts
    section: 1
  weechat:
    categories:
      - Chat
    description: wee enhanced environment for chat
    section: 1
  wget:
    categories:
      - Network File Transfer
    description: the non-interactive network downloader
    section: 1
  whack:
    categories:
      - Funny
    description: mangle requests to a printer or damage a printer
    section: 1fun
  whatis:
    categories:
      - Getting Help
    description: display manual page descriptions
    section: 1
  when:
    categories:
      - Task Managers
    description: a minimalistic personal calendar program
    section: 1
  whereis:
    categories:
      - File Find
    description: 'locate binary, source, and manual page for a command'
    section: 1
  which:
    categories:
      - File Find
    description: locate a command
    section: 1
  which-pkg-broke:
    categories:
      - Setup
    description: find which package might have broken another
    section: 1
  whichman:
    categories:
      - Getting Help
    description: search for a man page using a fault tolerant search
    section: 1
  who:
    categories:
      - User Information
    description: print all usernames currently logged in
    section: 1
  whoami:
    categories:
      - User Information
    description: print effective userid
    section: 1
  whohas:
    categories:
      - Setup
    description: find packages in various distributions repositories
    section: 1
  whois:
    categories:
      - Network
    description: client for the whois directory service
    section: 1
  whowatch:
    categories:
      - Processes
      - User Information
    description: 'console, interactive, process and users monitoring tool'
    section: 1
  wipe:
    categories:
      - Files
    description: securely erase files from magnetic media
    section: 1
  wireshark:
    categories:
      - Network Capture
    description: interactively dump and analyze network traffic
    section: 1
  wmctrl:
    categories:
      - X Windows
    description: interact with a ewmh/netwm compatible x window manager
    section: 1
  woof:
    categories:
      - Network File Transfer
    description: 'a small, simple, stupid webserver to share files'
    section: 1
  wordgrinder:
    categories:
      - Office
    description: console-based word processor
    section: 1
  wordplay:
    categories:
      - Spelling
    description: anagram finder
    section: 1
  workbone:
    categories:
      - CD/DVD/BluRay
      - Audio Players
    description: interactive text-mode program for playing audio cd
    section: 1
  worklog:
    categories:
      - Office
    description: keeping track of time spent on different projects
    section: 1
  worm:
    categories:
      - Games
    description: play the growing worm game
    section: 6
  wput:
    categories:
      - Network File Transfer
    description: wget-like ftp-uploader
    section: 1
  write:
    categories:
      - User Information
      - Chat
    description: send a message to another user
    section: 1
  wrjpgcom:
    categories:
      - Images
    description: insert text comments into a jpeg file
    section: 1
  wtf:
    categories:
      - Spelling
    description: translates acronyms for you
    section: 6
  wump:
    categories:
      - Games
    description: hunt the wumpus in an underground cave
    section: 6
  wvWare:
    categories:
      - Conversion
    description: convert msword documents
    section: 1
  wvdial:
    categories:
      - Hardware
    description: ppp dialer with built-in intelligence
    section: 1
  wyrd:
    categories:
      - Task Managers
    description: front-end to remind
    section: 1
  x2x:
    categories:
      - X Windows
    description: use keyboard and mouse from an x display on antoher x
    section: 1
  x86info:
    categories:
      - Hardware
    description: display x86 cpu diagnostics
    section: 1
  xalan:
    categories:
      - Development
    description: process xml documents with xslt stylesheets
    section: 1
  xargs:
    categories:
      - Pipes
    description: build and execute command lines from standard input
    section: 1
  xbindkeys:
    categories:
      - X Windows
    description: grab key and mouse events in x and starts shell commands
    section: 1
  xcalib:
    categories:
      - X Windows
    description: tiny monitor calibration loader for x
    section: 1
  xclip:
    categories:
      - X Windows
    description: command line interface to x selections (clipboard)
    section: 1
  xclipboard:
    categories:
      - X Windows
    description: x clipboard client
    section: 1
  xdg-open:
    categories:
      - X Windows
    description: opens a file or url in the user preferred application
    section: 1
  xdotool:
    categories:
      - X Windows
    description: command-line x11 automation tool
    section: 1
  xdpyinfo:
    categories:
      - X Windows
    description: display information utility for x
    section: 1
  xdriinfo:
    categories:
      - X Windows
    description: query configuration information of dri drivers
    section: 1
  xdvi:
    categories:
      - Office
    description: dvi previewer for the x window system
    section: 1
  xev:
    categories:
      - X Windows
    description: x event viewer
    section: 1
  xfd:
    categories:
      - X Windows
    description: display all the characters in an x font
    section: 1
  xfontsel:
    categories:
      - X Windows
    description: point and click selection of x11 font names
    section: 1
  xgrep:
    categories:
      - Development
    description: search content of xml file via xpath or curstom search
    section: 1
  xhost:
    categories:
      - X Windows
    description: server access control program for x
    section: 1
  xine:
    categories:
      - Videos
    description: a free video player
    section: 1
  xine-remote:
    categories:
      - Videos
    description: a small tool to connect xine remote control server
    section: 1
  xinput:
    categories:
      - X Windows
    description: utility to configure and test x input devices
    section: 1
  xkill:
    categories:
      - Funny
    description: 'kill processes or users, including usenet poster'
    section: 1fun
  xlart:
    categories:
      - Funny
    description: interactive x interface to rlart
    section: 1fun
  xlhtml:
    categories:
      - Conversion
    description: convert excel xls files to html
    section: 1
  xls2csv:
    categories:
      - Conversion
    description: output ms-excel file as comma-separated values
    section: 1
  xlsfonts:
    categories:
      - X Windows
    description: server font list displayer for x
    section: 1
  xlsx2csv:
    categories:
      - Conversion
    description: convert xslx xml files to csv format
    section: 1
  xmag:
    categories:
      - X Windows
    description: magnify parts of the screen
    section: 1
  xmessage:
    categories:
      - X Windows
    description: display a message/query in a window (x-based /bin/echo)
    section: 1
  xmlcatalog:
    categories:
      - Development
    description: parse and manipulate xml or sgml catalog files
    section: 1
  xmlindent:
    categories:
      - Development
    description: xml stream reformatter
    section: 1
  xmllint:
    categories:
      - Development
    description: command line xml tool
    section: 1
  xmlstarlet:
    categories:
      - Development
      - Text Utilities
    description: command line xml/xslt toolkit
    section: 1
  xmms2:
    categories:
      - Audio Players
    description: command-line interface to the xmms2 daemon
    section: 1
  xmodmap:
    categories:
      - X Windows
    description: set/modify keymaps and pointer button mappings in x
    section: 1
  xmp:
    categories:
      - Audio Players
    description: extended module player
    section: 1
  xnee:
    categories:
      - X Windows
    description: 'records, replays x11 data on multiple displays'
    section: 1
  xorriso:
    categories:
      - CD/DVD/BluRay
    description: creates and manipulates iso filesystem with rockridge
    section: 1
  xprobe2:
    categories:
      - Network Scan
    description: a remote active operating system fingerprinting tool
    section: 1
  xprop:
    categories:
      - X Windows
    description: property displayer for x
    section: 1
  xrandr:
    categories:
      - X Windows
    description: primitive command line interface to randr extension
    section: 1
  xrdb:
    categories:
      - X Windows
    description: x server resource database utility
    section: 1
  xset:
    categories:
      - X Windows
    description: user preference utility for x
    section: 1
  xsetroot:
    categories:
      - X Windows
    description: root window parameter setting utility for x
    section: 1
  xsw:
    categories:
      - Office
    description: slide show presentation tool
    section: 1
  xte:
    categories:
      - X Windows
    description: generates fake input using the xtest extension
    section: 1
  xtrace:
    categories:
      - Debugging
    description: trace communication between x11 client and server
    section: 1
  xtrlock:
    categories:
      - X Windows
    description: lock x display until password supplied
    section: 1
  xvidtune:
    categories:
      - X Windows
    description: adjust x server origin and size
    section: 1
  xvinfo:
    categories:
      - X Windows
    description: print out x-video extension adaptor information
    section: 1
  xwininfo:
    categories:
      - X Windows
    description: window information utility for x
    section: 1
  xxd:
    categories:
      - Binary Information
    description: make a hexdump or do the reverse (patch)
    section: 1
  xz:
    categories:
      - Compression
    description: compress or decompress xz and lzma files
    section: 1
  xzcat:
    categories:
      - Viewers
    description: 'decompresses files to stdout (xz, lzma)'
    section: 1
  yacc:
    categories:
      - Development
    description: yet another compiler compiler
    section: 1
  yaourt:
    categories:
      - Setup
    description: more than a frontend to pacman (archlinux)
    section: 8
  yasm:
    categories:
      - Development
    description: the yasm modular assembler
    section: 1
  yauap:
    categories:
      - Audio Players
    description: audio player based on the gstreamer framework
    section: 1
  yes:
    categories:
      - Other
    description: output a string repeatedly until killed
    section: 1
  yokadi:
    categories:
      - Task Managers
    description: commandline todo system
    section: 1
  youtube-dl:
    categories:
      - Network File Transfer
      - Websites
    description: download video from youtube or other video platforms
    section: 1
  ypdomainname:
    categories:
      - Network
    description: show or set the system's yp domain name
    section: 1
  ytalk:
    categories:
      - User Information
      - Chat
    description: multi-user chat program
    section: 1
  yum:
    categories:
      - Setup
    description: yellowdog updater modified (redhat)
    section: 8
  zcat:
    categories:
      - Viewers
    description: expand and concatenate data (gz)
    section: 1
  zcmp:
    categories:
      - File Compare
    description: compare compressed files
    section: 1
  zdiff:
    categories:
      - File Compare
    description: compare compressed files
    section: 1
  zenity:
    categories:
      - X Windows
    description: display gtk+ dialogs
    section: 1
  zgrep:
    categories:
      - Text Utilities
    description: search compressed files for a regular expression
    section: 1
  zile:
    categories:
      - Editors
    description: zile is lossy emacs
    section: 1
  zip:
    categories:
      - Compression
    description: compress files (windows zip)
    section: 1
  zless:
    categories:
      - Viewers
    description: file perusal filter for crt viewing of compressed text
    section: 1
  zmore:
    categories:
      - Viewers
    description: file perusal filter for crt viewing of compressed text
    section: 1
  zonecheck:
    categories:
      - Network
    description: dns zone checking tool
    section: 1
  zoo:
    categories:
      - Compression
    description: manipulate archives of files in compressed form
    section: 1
  zrun:
    categories:
      - Compression
    description: automatically uncompress arguments to command
    section: 1
  zsh:
    categories:
      - Interesting Pages
      - Shells
    description: the z shell
    section: 1
  zypper:
    categories:
      - Setup
    description: interface to zypp system management (opensuse)
    section: 8
length:
  description:
    max: 56
    min: 5
  line:
    max: 67
    min: 10
  name:
    max: 27
    min: 1

cliref_txt.md

_________ _____ _______________       _____
\_   ___ \\    \\___________   \____ / ____\     ~/.bash/cliref.md
/    \  \/|    | |   ||       _/ __ \  __\    copy/paste from whatisdb
\     \___|__  |_|_  ||    |   \  __/|_ |   http://pastebin.com/yGmGiDQX
 \________  /_____ \_||____|_  /____  /_|     [email protected]
 20160515 \/ 1527 \/         \/     \/

---

alias CLIRef.txt='curl -s "http://pastebin.com/raw/yGmGiDQX" | less -i'
alias CLIRef.md='lynx "https://gist.github.com/yunga/b036ac9749524e312fb8#file-cliref-md"'

Content

Other Documentation | Getting Help | Interesting Pages | | Shells | Network | Directories Terminal Tools | Wireless | Files | Network Monitor | Pipes Setup | Network Tunnels | File Attributes System | Network Scan | File Find Kernel | Network Capture | File Compare Init and Runlevels | Network Filesystems | Binary Information Hardware | Network Apps | File Managers Filesystem Tools | Modem/Fax/GSM | Viewers Quota | Network File Transfer | Editors Processes | Browser | Text Utilities Performances | RSS Reader | Print User Management | Podcast | Compression User Information | Chat | Encryption Environment | EMail | Backup Security Context | Newsgroups | CD/DVD/BluRay | Websites | | | Development | ASCII Art | Numbers and Math Debugging | Images | Date and Time Revision Control | Vector Graphics | Schedule Database | 3D | Office | Videos | Spelling Games | Audio and Music | Publishing Screensavers | Audio Players | Task Managers Other | Audio Editing | Conversion X Windows | Midi | Funny | Text to Speech |

Other Documentation

Local directories

manpages       /usr/man/                      /usr/share/man/
infopages      /usr/info/                     /usr/share/info/
packages       /usr/doc/                      /usr/share/doc/
linux doc prj  /usr/doc/ldp/                  /usr/share/doc/ldp/
howtos         /usr/doc/howto/                /usr/share/doc/howto/
mini howtos    /usr/doc/howto/mini/           /usr/share/doc/howto/mini/
kernel         /usr/src/linux/documentation/
x window       /usr/x11r6/lib/x11/doc/
apache         /home/httpd/html/manual/       /var/www/html/manual/
latex doc      /usr/share/texmf/doc/latex/latex2e-html/
tex            /usr/share/texmf/doc/

On the Web

• The Linux man-pages project https://www.kernel.org/doc/man-pages/
• Linux Manpages Online http://man.cx/
• Ubuntu Manpage Repository http://manpages.ubuntu.com/
• ArchWiki https://wiki.archlinux.org/
• Debian Wiki https://wiki.debian.org/
• The Debian Administrator's Handbook https://debian-handbook.info/browse/stable/
• The Linux Documentation Project http://tldp.org/
• GreyCat's wiki http://mywiki.wooledge.org/
• Bash Hackers Wiki http://wiki.bash-hackers.org/
• Rosetta Stone for Unix http://bhami.com/rosetta.html
• Unix Toolbox http://cb.vu/unixtoolbox.xhtml
• Inconsolation https://inconsolation.wordpress.com/
• Command Line Kung Fu http://blog.commandlinekungfu.com/
• CommandLineFu http://www.commandlinefu.com/
• Unix Mages http://unixmages.com/
• SuperUser https://superuser.com/
• Ask Ubuntu https://askubuntu.com/
• Unix on StackExchange https://unix.stackexchange.com/
• Shell subreddits https://www.reddit.com/r/bash+bashtricks+commandline+scriptswap+shell+zsh

Tools:

• ShellCheck http://www.shellcheck.net/
• ExplainShell http://explainshell.com/
• Coding Ground http://www.tutorialspoint.com/codingground.htm

Manpages Sections on various platforms

Section | General use on various unix platforms 0 | c library header files 1 | general commands 1c | communications 1g | graphics 1m | maintenance, system administration commands and daemons 2 | system calls 3 | library functions, in particular the c standard library 3c | c programming language 3f | fortran programming language 3m | miscellaneous programming routines 4 | special files, devices, drivers, formats and conventions 5 | file formats and conventions miscellanea 6 | games and screensavers 7 | miscellanea, special files, devices and drivers 8 | system administration commands and daemons 9 | kernel routines l | local, some programs install pages here instead of (1) n | tcl/tk keywords x | the x window system ?p | perl scripts man pages ?posix | posix man pages ?fun | funny command lines

Getting Help

man              an interface to the on-line reference manuals
apropos          search the manual page names and descriptions
whatis           display manual page descriptions
whichman         search for a man page using a fault tolerant search
info             read info documents
help             shell built-in help
debmany          show documentation from installed packages
debian-reference open the post-installation user's guide in browser
type             display information about command type
konqueror        browse man:/info:/perldoc:/etc. thanks to kio
popbugs          find release critical bugs in packages you use

Interesting Pages

intro.1          user commands
intro.2          system calls
intro.3          library functions
intro.4          special files
intro.5          file formats
intro.6          games
intro.7          overview/conventions/miscellany section
intro.8          administration and privileged commands
undocumented.7   no manpage for this program, utility or function
missing          missing manual pages
LDP              linux documentation project with help and guides
man-pages        conventions for writing linux man pages
environ          user environment
hier             description of the filesystem hierarchy
file-hierarchy   file system hierarchy overview
capabilities     overview of linux capabilities
signal           overview of signals
standards        standards - c and unix standards
units.7          units, kilo/kibi/mega, decimal and binary prefixes
libc             overview of standard c libraries on linux
posixoptions     optional parts of the posix standard
errno            look up errno names and descriptions
errno.3          number of last error
undocumented.3   undocumented library functions
printf           formatted output conversion
strftime         format date and time
acl              access control lists
ascii            report character aliases
ascii.7          ascii characters in octal, decimal, and hexadecimal
unicode          universal character set
locale.7         description of multilanguage support
readline         get a line from a user with editing (inputrc)
terminfo         terminal capability data base
bash             gnu bourne-again shell
zsh              the z shell
glob             globbing pathnames
regex            posix.2 regular expressions
pcrepattern      pcre - perl-compatible regular expressions
pcresyntax       pcre - perl-compatible regex syntax summary
perlintro        brief introduction and overview of perl
perlcheat        perl 5 cheat sheet
gittutorial      a tutorial introduction to git
random           kernel random number source devices

Shells

sh               shell, the standard command language interpreter
bash             gnu bourne-again shell
fish             the friendly interactive shell
zsh              the z shell
fizsh            friendly interactive zshell
ksh              kornshell, a command and programming language
pdksh            legacy kornshell built on mksh
mksh             mirbsd kornshell
csh              a shell with c-like syntax
tcsh             c shell with file name completion and cli editing
ash              the almquist shell
dash             the debian almquist shell
rc               a shell for plan 9 and unix systems
git-sh           a git shell (bash)
shellcheck       analyzes shell scripts and points out typical issues

Terminal Tools

screen           screen manager with vt100/ansi terminal emulation
tmux             terminal multiplexer
byobu            wrapper script for seeding configuration to screen/tmux
dvtm             dynamic virtual terminal manager
twin             textmode window environment
dtach            program that emulates the detach feature of screen
reptyr           reparent a running program to a new terminal/screen
kibitz           allow two people to interact with one shell
script           make typescript of terminal session
scriptreplay     play back typescripts, using timing information
ttyrec           a tty recorder
ttyplay          player of the tty session recorded by ttyrec
clear            clear the screen
reset            terminal initialization
openvt           start a program on a new virtual terminal (vt)
chvt             change foreground virtual terminal
deallocvt        deallocate unused virtual terminals
tty              display the name of the terminal connected to stdin
stty             change and print terminal line settings
tabs             set terminal tabs
setterm          set terminal attributes
tput             change terminal characteristics
tic              the terminfo entry-description compiler
toe              table of (terminfo) entries
infocmp          compare or print out terminfo descriptions
captoinfo        convert a termcap description into terminfo description
infotocap        convert a terminfo description into termcap description

Setup

apt-get          apt package handling utility (debian)
apt-config       apt configuration query program
apt-cache        query the apt cache
apt-file         apt package searching utility
dlocate          program to view debian package information
whohas           find packages in various distributions repositories
apt-mark         mark/unmark a package as being automatically-installed
debfoster        weed unnecessary debian packages
deborphan        orphaned package finder
dgrep            grep through files belonging to an installed package
dglob            expand package names or files matching a pattern
dpigs                  show which installed packages occupy the most space
popularity-contest     list the most popular packages on the system
popcon-largest-unused  list size of unused packages on the system
popbugs                find release critical bugs in packages used
which-pkg-broke        find which package might have broken another
dpkg                   package manager for debian
dpkg-reconfigure       reconfigure an already installed package
debconf                run a debconf-using program
debconf-get-selections output contents of debconf database
debconf-set-selections insert new values into the debconf database
update-alternatives    maintain symlinks for default commands
update-manager         graphical management of software updates
dselect          debian package management frontend
aptitude         high-level interface to the package manager
synaptic         graphical management of software packages (xwindows)
alien            convert or install an alien binary package (rpm, deb)
smart            the smart package manager (apt/rpm/yum/etc)
yum              yellowdog updater modified (redhat)
rpm              rpm package manager (redhat)
urpmi            rpm downloader/installer/dependency solver (mandriva)
zypper           interface to zypp system management (opensuse)
pacman           package manager utility (archlinux)
yaourt           more than a frontend to pacman (archlinux)
stow             software package installation manager (with symlinks)
checkrestart     check which processes need a restart after an upgrade

System

inxi             lists kernel/drivers/cpu/ram/gcc/xorg/desktop/etc.
nmon             systems administrator, tuner, benchmark tool
collectl         collects data that describes the current system status
binstats         display statistics about programs and libraries
uptime           view the system load and how long it has been running
times            show process times for the shell and its child
lsb_release      print distribution-specific information
uname            print system/kernel information
arch             print machine hardware name (same as uname -m)
nproc            print the number of processing units available
procinfo         display system statistics gathered from /proc
mpstat           report processors related statistics
saidar           a curses-based tool for viewing system statistics
perf-top         system profiling tool
lmbench          system benchmarks
sysbench         a modular, multi-threaded benchmark tool
sar              collect, report, or save system activity information
hostid           print the numeric identifier for the current host
free             display amount of free/used/swap memory in the system
swapon           enable device and file for paging and swapping
swapoff          disable devices and files for paging and swapping
vmstat           report virtual memory statistics
dstat            versatile tool for generating system resource stats
iostat           report cpu and io statistics for dev, part and nfs
iotop            simple top-like i/o monitor
fio              flexible i/o tester
blktrace         generate traces of the i/o traffic on block devices
blockdev         call block device ioctls from the command line
slabtop          display kernel slab cache information in real time
tload            graphic representation of system load average
logger           a shell interface to the syslog system log module
logwatch         system log analyzer and reporter
swatch           simple watcher
imvirt           detects several virtualizations

Kernel

lsmod            program to show the status of modules in linux kernel
insmod           simple program to insert a module into the linux kernel
rmmod            simple program to remove a module from the linux kernel
modinfo          program to show information about a linux kernel module
modprobe         program to add and remove modules from the linux kernel
modconf          a module configuration utility
depmod           program to generate modules.dep and map files
sysctl           configure kernel parameters at runtime

Init and Runlevels

initctl          upstart service configuration
start            init daemon control tool
stop             init daemon control tool
status           init daemon control tool
chkconfig        enable or disable system services
service          run a system v init script
sysv-rc-conf     run-level configuration for sysv like init script links
runlevel         output previous and current runlevel
telinit          change system runlevel
checkrestart     check which processes need a restart after an upgrade
systemctl        control the systemd system and service manager
journalctl       query the systemd journal
loginctl         control the systemd login manager
halt             reboot or stop the system
reboot           reboot or stop the system
shutdown         shutdown or restart the system
poweroff         reboot or stop the system

Hardware

x86info          display x86 cpu diagnostics
dmesg            print kernel and driver messages
hdparm           get/set sata/ide device parameters
smartctl         control and monitor utility for smart disks
badblocks        search a device for bad blocks
setserial        get/set linux serial port information
wvdial           ppp dialer with built-in intelligence
lshw             list hardware
lshal            lists all devices the hardware abstraction layer knows
lsdev            display information about installed hardware
lsblk            list block devices
lsusb            list usb devices
lspci            list all pci devices
setpci           configure pci devices
pnpdump          dump isa plug-and-play devices resource information
isadump          examine isa registers
scsiinfo         query information from a scsi device
sginfo           access mode page information for a scsi/atapi device
sg_map           displays mapping between linux sg and scsi devices
udevadm          udev management tool
ethtool          query or control network driver and hardware settings
mii-tool         view, manipulate media-independent interface status
dmidecode        dmi table decoder
hwinfo           probe for hardware
acpitool         acpi client, allowing you to query or set acpi values
apm              interface with the apm subsystem
alsamixer        soundcard mixer for alsa driver
aumix            adjust audio mixer
pactl            control a running pulseaudio sound server
rexima           a curses-based (and command-line) mixer
alsactl          advanced controls for alsa soundcard driver
showkey          examine the codes sent by the keyboard
loadkeys         load keyboard translation tables
dumpkeys         dump keyboard translation tables
setleds          set the keyboard leds
imvirt           detects several virtualizations

Filesystem Tools

df               report file system disk space usage
discus           print a report of disk space usage
mount            mount a filesystem
umount           unmount file systems
mhddfs           combines a several mount points into a single one
fusermount       mount and unmount fuse filesystems
findmnt          find a filesystem
mountpoint       see if a directory is a mountpoint
sync             flush disk caches
mkfs             build a linux file system
tune2fs          adjust tunable filesystem parameters on ext2/ext3/ext4
fsck             check and repair a linux file system
badblocks        search a device for bad blocks
debugfs          ext2/ext3/ext4 file system debugger
fdisk            partition table manipulator for linux
cfdisk           curses/slang based disk partition table manipulator
parted           a partition manipulation program
fdformat         low-level format a floppy disk
mtools           utilities to access dos disks in unix
lilo             install linux boot loader
grub             install grand unified bootloader
dd               convert/copy a file, write disk headers, boot records
ddrescue         data recovery tool
dcfldd           enhanced version of dd for forensics and security
foremost         recover files using their headers/footers/structures
photorec         recover lost files from hdisk, digital camera and cdrom
safecopy         data recovery tool

Quota

quota            display disk usage and limits
repquota         summarize quotas for a filesystem
setquota         set disk quotas
edquota          edit user quotas
quotaon          turn filesystem quotas on
quotaoff         turn filesystem quotas off
quotacheck       scan for disk usage, create, check, repair quota files
convertquota     convert quota from old file format to new one

Processes

ps               report a snapshot of the current processes
w                show who is logged on and what they are doing
top              monitor processes
htop             interactive process viewer
atop             at computing system & process monitor
gitps            a visual process viewer/killer (gnu interactive tools)
glances          a cross-platform curses-based system monitoring tool
pidstat          report statistics for linux tasks
powertop         program to analyze power consumption on intel laptops
prtstat          print statistics of a process
pstree           display a tree of processes
whowatch         console, interactive, process and users monitoring tool
kill             send a signal to a process
killall          kill all processes named proc
pidof            find the process id of a running program
pkill            signal processes based on name and other attributes
pgrep            lookup processes based on name and other attributes
skill            send a signal or report process status
snice            send a signal or report process status
nice             set/run a program with modified scheduling priority
renice           alter priority of running processes
ionice           set or get process i/o scheduling class and priority
cpulimit         limits the cpu usage of a process
taskset          retrieve or set a process cpu affinity
setuid           run a command with a different uid
setsid           run a program in a new session
nohup            runs a command immune to hangups, outputs to a non-tty
disown           shell built-in, removes each jobs from shell
jobs             lists the active jobs
bg               lists stopped or background jobs, resume a stopped job
fg               brings the most recent job to foreground
time             time a simple command
timeout          run a command with a time limit
uux              remote command execution
uustat           uucp status inquiry and job control
ipcs             report interprocess communication facilities status
ipcrm            remove message, semaphore, or shared memory identifier

Performances

See Brendan D. Gregg [Linux Perf page] (http://www.brendangregg.com/linuxperf.html)

collectl         collects data that describes the current system status
glances          a cross-platform curses-based system monitoring tool
uptime           view the system load and how long it has been running
mpstat           report processors related statistics
lmbench          system benchmarks
sysbench         a modular, multi-threaded benchmark tool
sar              collect, report, or save system activity information
free             display amount of free/used/swap memory in the system
swapon           enable/disable device and file for paging and swapping
vmstat           report virtual memory statistics
dstat            versatile tool for generating system resource stats
iostat           report cpu and io statistics for dev, part and nfs
iotop            simple top-like i/o monitor
fio              flexible i/o tester
blktrace         generate traces of the i/o traffic on block devices
slabtop          display kernel slab cache information in real time
sysctl           configure kernel parameters at runtime
hdparm           get/set sata/ide device parameters
ps               report a snapshot of the current processes
top              monitor processes
htop             interactive process viewer
pidstat          report statistics for linux tasks
nice             set/run a program with modified scheduling priority
renice           alter priority of running processes
ionice           set or get process i/o scheduling class and priority
taskset          retrieve or set a process cpu affinity
sysdig           a system-level exploration and troubleshooting tool
ltrace           a library call tracer
strace           trace system calls and signals
errno            look up errno names and descriptions
explain          explain system call error messages
stap             systemtap script translator driver
ktap             lightweight script-based dynamic tracing tool for linux
llttng           tracer control command line tool
perf             performance analysis tools for linux
tiptop           display hardware performance counters for linux tasks
ethtool          query or control network driver and hardware settings
iperf            perform network throughput tests
pchar            perform network measurements along an internet path
ping             check if host is reachable
hping3           send (almost) arbitrary tcp/ip packets to network hosts
traceroute       print the route packets trace to network host (see mtr)
mtr              traceroute and ping programs diagnostic tool
nicstat          print network traffic statistics
netstat          print connections, routing, masquerade, multicast stats
ss               another utility to investigate sockets
socklist         display list of open sockets
sockstat         list open sockets
iptraf           interactive colorful ip lan monitor
tcpdump          dump traffic on a network
darkstat         network statistics gatherer
justniffer       an extensive tcp flow sniffer
snmpget          communicates with a network using snmp get requests
lldptool         manage the lldp settings and status of lldpad
tune2fs          adjust tunable filesystem parameters on ext2/ext3/ext4
dd               convert/copy a file, write disk headers, boot records
siege            an http/https stress tester
tsung            distributed multi-protocol load testing tool

User Management

adduser          add a user or group to the system
useradd          create a new user or update default user information
userdel          delete a user account and related files
usermod          modify a user account
newusers         update and create new users in batch
groupadd         create a new group
groupdel         delete a group
groupmod         modify a group definition on the system
newgrp           log in to a new group
chage            change user password expiry information
chfn             change real user name and information
chsh             change login shell
passwd           change user password

User Information

id               print real and effective user and group ids
groups           print group names a user is in
sa               summarizes accounting information
ac               print statistics about users connect time
who              print all usernames currently logged in
whowatch         console, interactive, process and users monitoring tool
whoami           print effective userid
rwho             determine all users logged on your local network
w                show who is logged on and what they are doing
last             show listing of last logged in users
lastb            show listing of bad loggin attemps
lastlog          reports recent login of all users or of a given user
lastcomm         print information about previously executed commands
users            print the user names of users currently logged in
logname          print the login name of a user
talk             talk to another user
ytalk            multi-user chat program
write            send a message to another user
wall             write a message to users
mesg             control write access to your terminal

Environment

printenv         print all or part of environment
env              run a program in a modified environment
locale           get locale-specific information
localedef        compile locale definition files

Security Context

su               change user id or become superuser
sudo             execute a command as another user
sudoedit         edit one or more files as another user
op               grant trusted users access to certain root operations
runcon           run command with specified security context (selinux)
chcon            change file security context (selinux)
chroot           run command or interactive shell with special root dir
schroot          securely enter a chroot environment
rarun2           run programs with different env/args/perms/dirs/etc

Development

perl             the perl language interpreter
perldoc          look up perl documentation in pod format
perltidy         a perl script indenter and reformatter
perlcritic       command-line interface to critique perl source
perlbug          how to submit bug reports on perl
cpan             easily interact with cpan from the command line
txt2regex        a regular expression wizard
ruby             interpreted object-oriented scripting language
irb              interactive ruby
gem              the front end to rubygems
python           an interpreted, object-oriented programming language
pydoc            the python documentation tool
pycompile        byte compile python source files
pychecker        program to check python scripts for common mistakes
ghc              the glasgow haskell compiler
ghci             the glasgow haskell compiler
lua              lua interpreter
luac             lua compiler
luadoc           generate documentation from files
luarocks         module deployment system for lua
node             server-side javascript
js_beautify      command tool to beautify your javascript files
jq               command-line json processor
jsoncat          display json data
jsonlint         json syntax validator and formatter tool
java             the java application launcher
javac            java programming language compiler
javadoc          the java api documentation generator
jardiff          visualise api differences between two jar files
php              php command line interface cli
clisp            ansi common lisp compiler, interpreter and debugger
fort77           fortran compiler
f2c              convert fortran 77 to c or c++
fc               frontend script to the f2c fortran compiler
nasm             the netwide assembler, a portable 80x86 assembler
yasm             the yasm modular assembler
as               the portable gnu assembler
rasm2            assemble and disassemble files or hexpair strings
gcc              gnu project c and c++ compiler
gprof            display call graph profile data
ld               the gnu linker
c99              compile standard ansi c programs
cpp              the c preprocessor
make             gnu make utility to maintain groups of programs
dmake            maintain program groups, or interdependent files
cmake            cross-platform makefile generator
cxref            generate a c-language program cross-reference table
ctags            generate tag file for emacs, vi
cflow            generate a c-language flowgraph
cscope           interactively examine a c program
sloccount        count source lines of code (sloc)
cloc             count lines of source code and comments
pepper           repository statistics and report tool
astyle           indentation and reformatting filters c, c++, c#, java
indent           reformat a c program, inserting or deleting whitespace
bcpp             make c++ beautifier
uncrustify       c, c++, c#, d, java and pawn source code beautifier
xmlstarlet       command line xml/xslt toolkit
xmllint          command line xml tool
xgrep            search content of xml file via xpath or curstom search
xmlcatalog       parse and manipulate xml or sgml catalog files
xalan            process xml documents with xslt stylesheets
xmlindent        xml stream reformatter
tidy             validate, correct, and pretty-print html files
csstidy          css parser and optimiser
highlight        universal code highlighter converter (html, rtf, ...)
lex              generate programs for lexical tasks
strip            remove unnecessary information from executable files
m4               macro processor
yacc             yet another compiler compiler
flex             lexical analyser, generates code for pattern-matching
gencat           generate a formatted message catalog
getconf          get configuration values
errno            look up errno names and descriptions
explain          explain system call error messages

Debugging

gdb              the gnu debugger
r2               advanced hexadecimal editor, disassembler and debugger
elfsh            the elsf shell
e2dbg            the embedded elf debugger
readelf          displays information about elf files
rabin2           get information about elf/pe/mz/class
objdump          display information from object files
objcopy          copy and translate object files
nm               list symbols from object files
lsof             list open files/streams/sockets/etc
lslk             list local locks
fuser            identify processes using files or sockets
trace-cmd        interacts with ftrace linux kernel internal tracer
trace-cmd-list   list available plugins, events or options for ftrace
pstack           print a stack trace of running processes
dtrace           tune and troubleshoot programs and system (systemtap)
sysdig           a system-level exploration and troubleshooting tool
etrace           the embedded elf tracer
eresi            the eresi reverse engineering software interface
errno            look up errno names and descriptions
explain          explain system call error messages
strace           trace system calls and signals
ltrace           a library call tracer
mtrace           interpret output from malloc_trace
xtrace           trace communication between x11 client and server
stap             systemtap script translator driver
ktap             lightweight script-based dynamic tracing tool for linux
llttng           tracer control command line tool
perf             performance analysis tools for linux
perf-stat        run a command and gather performance counter statistics
perf-list        list all symbolic event types
tiptop           display hardware performance counters for linux tasks
babeltrace       babeltrace trace viewer and converter for (ctf)
memdump          memory dumper
scanmem          locate and modify a variable in an executing process
crash            analyze linux crash dump data or a live system
binwalk          binary image search tool
strings          extract printable strings
ident            identify rcs keyword strings in files
pmap             report memory map of a process
ldd                         print shared library dependencies
ldconfig                    configure dynamic linker run-time bindings
ld.so                       dynamic linker-loader
/lib/ld-linux.so.2          dynamic linker-loader
/lib64/ld-linux-x86-64.so.2 dynamic linker-loader

Revision Control

rcs              change rcs file attributes
ci               check in rcs revisions
co               check out rcs revisions
git              the stupid content tracker
tig              text-mode interface for git
bzr              bazaar next-generation distributed version control
cvs              concurrent versions system
darcs            an advanced revision control system
hg               mercurial source code management system
svn              subversion command line client tool

Database

sqlite3          command line interface for sqlite version 3
sqlite           a command line interface for sqlite
psql             postgresql interactive terminal
mysql            the mysql command-line tool
sql              execute a command on a database determined by a dburl
rrdtool          round robin database tool and grapher

Network

ip               show/manip routing, devices, policy routing and tunnels
tc               show/manipulate traffic control settings
ifconfig         set/display network information
ifdata           get network interface info without ifconfig parsing
ifstat           report interface statistics
ifdown           stop a network interface
ifup             bring a network interface up
ethtool          query or control network driver and hardware settings
mii-tool         view, manipulate media-independent interface status
nmcli            command-line tool for controlling networkmanager
nmtui            text user interface for controlling networkmanager
nm-tool          utility to report networkmanager state and devices
iperf            perform network throughput tests
nuttcp           network performance measurement tool
pchar            perform network measurements along an internet path
route            show/manipulate the ip routing table
hostname         print the system hostname
domainname       show or set the system nis/yp domain name
dnsdomainname    show the system dns domain name
nisdomainname    show or set the system's nis domain name
ypdomainname     show or set the system's yp domain name
whois            client for the whois directory service
dnstracer        trace a chain of DNS servers to the source
ping             check if host is reachable
hping3           send (almost) arbitrary tcp/ip packets to network hosts
traceroute       print the route packets trace to network host (see mtr)
tracepath        traces path to a network host, discovering mtu along
mtr              traceroute and ping programs diagnostic tool
netstat          print connections, routing, masquerade, multicast stats
lsof             list open files/streams/sockets/etc
ss               another utility to investigate sockets
host             dns lookup utility
dig              dns lookup utility
nslookup         query internet name servers interactively
zonecheck        dns zone checking tool
nc               netcat, arbitrary tcp and udp connections and listens
cryptcat         twofish encryption enabled version of nc
ncat             concatenate and redirect sockets
socat            multipurpose relay (socket cat)
faucet           a fixture for a bsd network pipe (netpipes)
hose             the client end of a bsd network pipe (netpipes)
arping           arp find out ethernet address by first arping then arp
arp              manipulate the system arp cache
arpwatch         keep track of ethernet/ip address pairings
arpspoof         intercept packets on a switched lan
rarp             manipulate the system rarp table
ufw              program for managing a netfilter firewall
iptables           administration tool for ipv4 filtering and nat
ip6tables          ipv6 packet filter administration
iptables-save      dump iptables rules to stdout
ip6tables-save     dump iptables rules to stdout
iptables-restore   restore ip tables
ip6tables-restore  restore ipv6 tables
iptstate           top-like display of ip tables state table entries
ipchains           control the packet filter/firewall (see iptables)
ipcalc           ipv4 netmask/broadcast/etc calculator
ipv6calc         a small utility to manipulate ipv6 addresses
sipcalc          ip subnet calculator
subnetcalc       ipv4/ipv6 subnet calculator
tcpkill          kill tcp connections on a lan
tcpnice          slow down tcp connections on a lan
sshow            ssh traffic analysis tool
sshmitm          ssh monkey-in-the-middle
smbclient        ftp-like client to access smb/cifs resources on servers
ntptrace         trace a chain of ntp servers back to the primary source
snmpget          communicates with a network using snmp get requests
snmpwalk         retrieve a management values subtree using snmp getnext
snmpcmd          behaviour common to most of the net-snmp commands
lldpad           link layer discovery protocol (lldp) agent daemon
lldptool         manage the lldp settings and status of lldpad
suricata         next generation intrusion detection and prevention tool

Wireless

iw               show/manipulate wireless devices and configuration
iwconfig         configure a wireless network interface
iwlist           detailed information about a wireless interface
iwevent          show wireless events generated by drivers and hardware
iwgetid          report essid, nwid, ap/cell address of wireless network
wavemon          a wireless network monitor
kismet           wireless sniffing and monitoring

Network Monitor

ntop             display top network users
ntopng           display top network users
nload            displays the current network usage
cbm              display the current traffic on all network devices
sntop            top-like console network status tool
iftop            display bandwidth usage on an interface by host
jnettop          view hosts/ports taking up the most network traffic
bmon             bandwidth monitor and rate estimator
bwn-ng           a live monitor for network and disk io
speedometer      display the rate of data across a network connection
netload          network device load monitor
nethogs          a small net top tool, displays usage per process
slurm            yet another network load monitor
vnstat           a console-based network traffic monitor
nicstat          print network traffic statistics
pktstat          display packet activity
iptraf           interactive colorful ip lan monitor
netwatch         ethernet internet protocol monitor
trafshow         full screen show network traffic
tcptrack         monitor tcp connections on the network
tcpreen          tcp stream monitoring tool
wavemon          a wireless network monitor

Network Tunnels

ip               show/manip routing, devices, policy routing and tunnels
ip-tunnel        tunnel configuration
stunnel          universal ssl tunnel
ptunnel          tunnel tcp connections over icmp packets
udptunnel        tunnel udp packets over a tcp connection

Network Scan

nmap             network exploration tool and security / port scanner
ndiff            utility to compare the results of nmap scans
scapy            interactive packet manipulation tool
nping            network packet generation tool / ping utility
arp-scan         the arp scanner
sslscan          fast ssl scanner
xprobe2          a remote active operating system fingerprinting tool
p0f              identify remote systems passively

Network Capture

wireshark        interactively dump and analyze network traffic
tshark           dump and analyze network traffic
scapy            interactive packet manipulation tool
dumpcap          dump network traffic
tcpspy           tcp/ip connection monitor
tcpdump          dump traffic on a network
tcptrace         a tcp connection analysis tool
tcpick           tcp stream sniffer and connection tracker
tcpflow          tcp flow recorder
snort            packet sniffer/logger and intrusion detection system
pcapdump         dedicated packet capture utility
pcapip           filter a pcap for ip addresses
pcappick         pick specific frames out of a pcap file by number
pcapuc           filter a pcap for ip addresses
ettercap         sniffer/content filter for man in the middle attacks
ngrep            network grep
tetheral         dump and analyze network traffic
sniffit          packet sniffer and monitoring tool
httpry           http logging and information retrieval tool
dsniff           password sniffer (lots of protocols)
kismet           wireless sniffing and monitoring

Network Filesystems

exportfs         maintain table of exported nfs file systems
showmount        show mount information for an NFS server
nfsstat          list nfs statistics
nfsiostat        report input/output statistics for nfs
sshfs            filesystem client based on ssh
curlftpfs        mount a ftp host as a local directory
flickrfs         virtual filesystem for flickr photosharing service

Network Apps

ssh              openssh ssh client (remote login program)
cssh             cluster admin tool, multiple ssh connection
ssh-copy-id      install public key in a remote machine authorized_keys
ssh-keygen       authkey generation, management and conversion
rsh              remote shell
crsh             cluster admin tool, multiple rsh connection
rlogin           openssh ssh client (remote login program)
telnet           log into remote hosts
ctel             cluster admin tool, multiple telnet connection
ccon             cluster admin tool, multiple console connection
uux              remote command execution
uustat           uucp status inquiry and job control
finger           user information lookup program

Modem/Fax/GSM

minicom          friendly serial communication program
efax             send/receive faxes with class 1, 2 or 2.0 fax modem
mgetty           smart data/fax modem getty
fax              fax sending and receiving with mgetty+sendfax
sendfax          submit a facsimile job for transmission
sendpage         submit a pager job for transmission
faxstat          for hylafax facsimile server status
faxspool         queue and convert files for faxing with sendfax
faxq             display fax jobs queued by faxspool
faxrunq          send fax jobs queued by faxspool
faxrm            remove fax jobs queued by faxspool
faxalter         alter parameters of a queued hylafax job
fax2ps           convert a tiff facsimile to compressed postscript
faxcover         generate postscript cover page for outgoing facsimile
faxmail          hylafax mail-to-fax (postscript) gateway application
textfmt          convert ascii text to postscript for facsimile
gammu            does some neat things with your cellular phone or modem

Network File Transfer

curl             transfer a url (swiss army tool)
wget             the non-interactive network downloader
httrack          offline browser : copy websites to a local directory
linkchecker      check html documents and websites for broken links
woof             a small, simple, stupid webserver to share files
wput             wget-like ftp-uploader
sftp             secure file transfer program
ncftp            browser program for the file transfer protocol
ncftpget         internet file transfer program for scripts
ncftpput         internet file transfer program for scripts
ftp              copy files between hosts
lftp             sophisticated file transfer program
scp              securely copy files between hosts
rcp              remote file copy
uucp             system-to-system copy
mulk             parallel network downloader with filtering and metalink
axel             light download accelerator (best imo)
aria             fast download utility (http, ftp, bittorrent, metalink)
aria2c           the ultra fast download utility http/ftp/bt/metalink
ctorrent              download bittorrent files from command line
rtorrent              a bittorrent client for ncurses
mktorrent             simple bittorrent metainfo file creator
bittorrent-downloader download files using a scatter-gather network
btdownloadcurses      download files using a scatter-gather network
amulecmd              console-based program to control amule
get_flash_videos downloader for flash-based video sites
rmtpdump         rtmp streaming media client
youtube-dl       download video from youtube or other video platforms
quvi             query media tool for parsing flash streams url
cclive           downloading media streams from youtube and similars
nc               netcat, arbitrary tcp and udp connections and listens
cryptcat         twofish encryption enabled version of nc
ncat             concatenate and redirect sockets
socat            multipurpose relay (socket cat)
faucet           a fixture for a bsd network pipe (netpipes)
hose             the client end of a bsd network pipe (netpipes)
trickle          a lightweight userspace bandwidth shaper

Browser

lynx             a general purpose, text-only browser for the www
links            lynx-like alternative character mode www browser
links2           lynx-like alternative character mode www browser
elinks           lynx-like alternative character mode www browser
netrik           the antrik internet browser
w3m              a text based web browser and pager
edbrowse         text editor and web browser
httrack          offline browser : copy websites to a local directory
surfraw          fast search/bookmarks access to various www clients
gopher           connect to gopher document server

RSS Reader

newsbeuter       an rss feed reader for text terminals
rsstail          console based rss news reader
canto            an ncurses rss reader
raggle           console rss aggregator
olive            console rss reader
rawdog           rss aggregator without delusions of grandeur
nrss             an ncurses rss reader
snownews         console rss newsreader

Podcast

hpodder          scan and download podcasts
podget           simple tool to automate downloading of podcasts
podracer         a podcast aggregator with bittorrent support

Chat

centerim         text mode based im client for linux
finch            instant messaging client (frontend to libpurple)
pork             console-based aol instant messenger & irc client
freetalk         a console based jabber client
mcabber          a simple jabber console client
ekg              gadu-gadu compatible client
BitchX           an advanced internet relay chat client
irssi            a modular irc client for unix
weechat          wee enhanced environment for chat
bitlbee          irc gateway to im chat networks
epic5            internet relay chat client for unix like systems
tinyirc          basic irc commands and an curses-based interface
ii               a minimalistic fifo and filesystem based irc client
sic              an extremly fast, small and simple irc client
tircd            an ircd proxy to the twitter api
talk             talk to another user
ytalk            multi-user chat program
write            send a message to another user
wall             write a message to users
mesg             control write access to your terminal

EMail

mail             minimal client to send and receive mail
mailx            send and receive internet mail
msmtp            an smtp client
mutt             text-based email client
alpine           internet news and email
notmuch          thread-based email index, search, and tagging
cone             read and send e-mail messages
elmo             the electronic mail operator
fetchyahoo       retrieve mail from yahoo webmail service
urlscan          browse the urls in an email message from a terminal

Newsgroups

slrn             an easy to use nntp / spool based newsreader
trn              threaded read news program
tin              usenet newsreader
nn               efficient net news interface (no news is good news)

Websites

shell-fm         console-based player for last.fm radio streams
google           command-line access to (some) google services
gcalcli          google calendar command line interface
episoder         tv show reminder from epguides.com and thetvdb.com
youtube-dl       download video from youtube or other video platforms
get_flash_videos downloader for various flash-based video sites
quvi             query media tool for parsing flash streams url
cclive           downloading media streams from youtube and similars
twyt             command line twitter client
bti              send a tweet to twitter.com from the command line
tircd            an ircd proxy to the twitter api
twidge           microblogging client for twitter, identica
weather          obtain weather conditions and forecasts

Directories

cd               change directory
pwd              print name of current/working directory
mkdir            make directories
rmdir            remove empty directories
tree             list contents of directories in a tree-like format
dirdiff          display diff and merge changes between directories
pushd            sh: add directories to stack
popd             sh: remove dir from stack, changes to the new top dir
dirs             display directory stack (pushd/popd)

Files

ls               list directory contents and files
dir              briefly list files
vdir             verbosely list directory contents
tree             list contents of directories in a tree-like format
dircolors        color setup for ls
df               report file system disk space usage
dfc              display file system space usage using graphs and colors
pydf             report colourised filesystem disk space usage
du               estimate file space usage
ncdu             ncurses disk usage
agedu            correlate disk usage and last-access times
touch            create file, change file timestamps
fallocate        preallocate or deallocate space to a file
truncate         shrink or extend the size of a file
dd               convert/copy a file, write disk headers, boot records
cp               copy files and directories
mcp              copy files by wildcard patterns
qcp              copy files editing the names in a text editor
install          copy files and set attributes
mv               move (rename) files
mmv              move files by wildcard patterns
rename           rename files by replacing expressions
prename          renames multiple files with perl expression
qmv              rename files editing the names in a text editor
convmv           converts filenames from one encoding to another
vidir            edit a directory in your text editor
detox            clean up filenames
rm               remove files or directories
unlink           call the unlink function to remove the specified file
shred            overwrite a file to hide its contents, and  delete it
wipe             securely erase files from magnetic media
gitwipe          an utility for wiping files (gnu interactive tools)
ln               make filesystem links
mln              link files by wildcard patterns
sln              link files (statically linked)
link             create a hard link to a file
readlink         print value of a symbolic link or canonical file name
cleanlinks       remove dangling symbolic links and empty directories
hardlink         Hardinks multiple copies of a file
stow             software package installation manager (with symlinks)
mkfifo           create named pipe
mknod            make block or character special files
mktemp           create a temporary file or directory
flock            manage locks from shell scripts
basename         strip directory and suffix from filenames
dirname          convert a full pathname to just a path
realpath         print the resolved path
pathchk          check whether file names are valid or portable
inotifywatch     gather filesystem access statistics using inotify
inotifywait      wait for changes to files using inotify
trash            trash utility compliant with freedesktop.org
trash-list       list trashed files
trash-restore    restore for command line trash utility
trash-empty      empty for command line trash utility

Pipes

tee              read from stdin, write to stdout and files
multitee         send multiple inputs to multiple outputs
pee              tee standard input to pipes
xargs            build and execute command lines from standard input
parallel         run programs in parallel
mispipe          pipe two commands returning the exit status of the first
pv               monitor the progress of data through a pipe
sponge           soaks up all standard input and write to a file after
stdbuf           run command with modified buffering for its stdstreams
ifne             run command if the standard input is not empty
ts               timestamp input
vipe             insert a text editor into a pipe

File Attributes

umask            set default file protections
stat             display file attributes or file system status
touch            change file timestamps
chown            change file owner and group
chgrp            change group ownership
chmod            change file mode bits
chattr           change advanced file attributes on a linux file system
lsattr           list advanced file attributes on a ext file system
getfattr         get extended attributes of filesystem objects
setfattr         set extended attributes of filesystem objects
getfacl          get file access control lists
setfacl          set file access control lists
test             check file types and compare values

File Find

find             search for files in a directory hierarchy
ftff             fault tolerant file find utility
updatedb         update a database for m/slocate
locate           locate files via index (m/slocate)
doodle           a tool to search the meta-data in your files
which            locate a command
whereis          locate binary, source, and manual page for a command
fdupes           finds duplicate files in a given set of directories
rdfind           finds duplicate files
findimagedupes   finds visually similar or duplicate images
hardlink         Hardinks multiple copies of a file

File Compare

diff             compare files line by line
zdiff            compare compressed files
bzdiff           compare compressed files
diff3            compare three files line by line
diffstat         make histogram from diff-output
rfcdiff          compare rfcs or internet drafts or any other text files
merge            three-way file merge
wdiff            display word differences between text files
sdiff            side-by-side merge of file differences
mcdiff           visual shell for unix-like systems
ndiff            utility to compare the results of nmap scans
bsdiff           generate a patch between two binary files
rdiff            binary diff tool for signature-based differences
quilt            tool to manage series of patches
bspatch          apply a patch built with bsdiff
patch            apply a diff file to an original
unify            transforms context diffs into unidiffs, or vice-versa
combine          combine lines from two files using boolean operations
comm             compare two sorted files line by line
cmp              compare two files byte by byte
zcmp             compare compressed files
bzcmp            compare compressed files
cksum            checksum and count the bytes in a file
sum              checksum and count the blocks in a file
md5sum           compute and check md5 message digest
md5pass          create an md5 password hash
shasum           print or check sha checksums
rhash            print or check ed2k, bittorrent, dc++, and other hashes
rahash2          block based hashing utility

Binary Information

file             determine file type
mimetype         identify file types
mimeopen         open files by mimetype
mediainfo        display information about audio/video files
rifle            ranger's file opener with special file type checking
extract          determine meta-information about a file
od               dump files in octal and other formats
xxd              make a hexdump or do the reverse (patch)
hexdump          ascii, decimal, hexadecimal, octal dump
mcview           midnight commander internal file viewer (ascii/hex)
dhex             hex editor with a diff mode
hexedit          view and edit files in hexadecimal or in ascii
tweak            efficient hex editor
hte              executable's editor
bsdiff           generate a patch between two binary files
bspatch          apply a patch built with bsdiff
rafind2          find byte patterns into files
rahash2          block based hashing utility
radiff2          unified binary diffing utility
hexdiff          hexadecimal visual diff for binary files
bbe              sed-like editor for binary files
dd               convert/copy a file, write disk headers, boot records
ddrescue         data recovery tool
foremost         recover files using their headers/footers/structures

File Managers

mc               midnight commander, visual shell for unix-like systems
gitfm            gnu interactive tools file manager
ranger           visual file manager
vifm             a ncurses based file manager with vi like keybindings
clex             file manager
vfu              text-mode file manager for unix/linux
pilot            simple file browser in the style of the alpine composer

Viewers

mcview           midnight commander internal file viewer (ascii/hex)
gitview          an ascii/hex file viewer (gnu interactive tools)
cat              concatenate files and print on the standard output
mad              append files by wildcard patterns
tac              concatenate and print files in reverse
rev              reverse characters of lines in file or files
spc              colorizes text for terminals and html (supercat)
lolcat           rainbow coloring for text
tac              concatenate and print files in reverse
combine          combine lines from two files using boolean operations
lnav             ncurses-based log file viewer
ccze             a robust log colorizer
zcat             expand and concatenate data (gz)
bzcat            decompresses files to stdout (bz2)
xzcat            decompresses files to stdout (xz, lzma)
less             opposite of more
zless            file perusal filter for crt viewing of compressed text
bzless           file perusal filter for crt viewing of bzip2
most             browse or page through a text file
more             file perusal filter for viewing
zmore            file perusal filter for crt viewing of compressed text
bzmore           file perusal filter for crt viewing of bzip2
pg               browse pagewise through text files

Editors

mcedit           internal file editor of gnu midnight commander
vi               text editor
vim              text editor
cream            set of macros making vim easier to use for beginners
emacs            gnu project emacs text editor
nano             a small and friendly text editor
jed              programmers editor
aee              another easy editor
diakonos         a customizable, usable console-based text editor
pico             simple text editor in the style of the alpine composer
zile             zile is lossy emacs

Text Utilities

truncate         shrink/extend the size of a file to the specified size
head             output the first 10 lines of file
tail             output the last 10 lines of file
multitail        browse through several files at once
since            display content of a file since the last time
split            split a file into fixed-size pieces
lxsplit          a simple tool for splitting and joining split files
nl               number lines of files
wc               print newline, word, and byte counts for each file
ex               text editor
ed               the standard text editor
red              line-oriented text editor
edbrowse         text editor and web browser
look             display lines beginning with a given string
grep             search files for lines of text matching a pattern
egrep            print lines matching a pattern (-e)
fgrep            search files for lines that match a fixed string (-f)
rgrep            print lines matching a pattern recursively (-r)
agrep            search a file for a string with approximate matching
sgrep            search a file for a structured pattern
zgrep            search compressed files for a regular expression
bzgrep           search bzip2 compressed files for a regular expression
ack              ack-grep is designed as a replacement for grep
ag               the silver searcher - like ack, but faster
urlview          url extractor/launcher (see urlscan for mails)
awk              pattern scanning and processing language
gawk             pattern scanning and processing language
mawk             pattern scanning and processing language
sed              stream editor for filtering and transforming text
psed             a stream editor
a2p              awk to perl translator
s2p              sed to perl translator
cut              extract columns from files
join             join lines of two files on a common field
combine          combine lines from two files using boolean operations
column           columnate lists
colrm            remove columns from a file
rs               reshape a data array
csplit           split a file into context-determined pieces
paste            append/merge columns
tr               translate, squeeze or delete characters
sort             sort lines of text files
msort            sort records in complex ways
tsort            perform topological sort
shuf             write a random permutation of the input lines to stdout
unsort           reorder lines in a file in semirandom ways
tac              concatenate and print files in reverse
rev              reverse characters of lines in file or files
uniq             report or omit repeated lines
tee              copy stdin to a file and to stdout simultaneously
multitee         send multiple inputs to multiple outputs
pr               convert text files for printing
fmt              optimally reformat text
par              filter for reformatting paragraphs
fold             wrap each input line to fit in specified width
expand           convert tabs to spaces
unexpand         convert spaces to tabs
uchardet         universalchardet (Universal Charset Detector)
recode           converts files between character sets
iconv            convert encoding of given files
unaccent         remove accents from input stream or a string
sq               squeeze a sorted word list
unsq             unsqueeze a sorted word list
csvtool          tool for performing manipulations on csv files
xmlstarlet       command line xml/xslt toolkit

Print

lp               send files to a printer
lpr              print files
lpq              show printer queue status
lpstat           print cups status information
lprm             remove print jobs
lpmove           move a job or all jobs to a new destination
cancel           cancel cups print jobs
lpc              line printer control program
ink              tool for checking the ink level of your printers
lpadmin          configure cups printers and classes
lpoptions        display or set cups printer options and defaults
cupsaccept       accept jobs sent to a destination
cupsreject       reject jobs sent to a destination
cupsdisable      stop printers and classes
cupsenable       start printers and classes
paperconfig      configure the system default paper size

Compression

dtrx             cleanly extract many archive types
atool            a script for managing file archives of various types
patool           portable archive file manager
gitunpack        gnu interactive tools - unified archive unpacking
ar               create, modify, and extract from archives
tar              the gnu version of the tar archiving utility
cpio             copy files to and from archives
7z               a file archiver with highest compression ratio
gzip             compress files (gnu zip)
pigz             parallel compress files (gnu zip)
bzip2            a block-sorting file compressor
lz               provides a listing of a  tar.gz archive
gunzip           expand files (gnu zip)
unpigz           parallel decompress files (gnu zip)
bunzip2          a block-sorting file decompressor
gzexe            compress executable files in place
bzexe            compress executable files in place
compress         compress and expand data
pbzip2           parallel bzip2 file compressor
lzip             reduces the size of files
pax              portable archive interchange
rar              archive files with compression
unrar            extract files from rar archives
compress         compress data
uncompress       expand files
shar             create shell archives
unshar           unpack a shar file
unace            extract, test and view ace archives
uuencode         encode a binary file
uudecode         decode a file created by uuencode
base64           encode/decode data and print to standard output
xz               compress or decompress xz and lzma files
lzma             lzma compression and decompression tool
lzma2            lzma compression and decompression tool
zoo              manipulate archives of files in compressed form
pxz              parallel lzma compressor compatible with xz
zip              compress files (windows zip)
cabextract       extract files from microsoft cabinet (cab)
zrun             automatically uncompress arguments to command

Encryption

gpg              openpgp encryption and signing tool
gpgv             verify openpgp signatures
crypt            encrypt or decrypt files (wrapper for mcrypt)
mcrypt           encrypt files, several algorythms
bcrypt           blowfish file encryption
ccrypt           encrypt and decrypt using rijndael block cipher (aes)
scrypt           encrypt or decrypt files
aespipe          aes encrypting or decrypting pipe
openssl          openssl command line tool
enc              symmetric cipher routines
stunnel          universal ssl tunnel
cryptcat         twofish encryption enabled version of nc
rsyncrypto       rsync friendly encryption
encfs            mounts or creates an encrypted virtual filesystem
encfsctl         administrative tool for working with encfs filesystems
stegdetect       finds image files with steganographic content
stegbreak        launches brute-force dictionary attacks on jpg image
steghide         a steganography program

Backup

mt               control magnetic tape drive operation
dump             ext2/3/4 filesystem backup
restore          restore files or filesystem from backups made with dump
tar              read write tape archives
par2             par 2.0 compatible file verification and repair tool
unison           user level file-synchronization tool
rsync            a fast, versatile, remote (and local) file-copying tool
rsyncrypto       rsync friendly encryption
duplicity        encrypted incremental backup to local or remote storage
backup-manager   an easy to use backup tool for your linux box
rdist            remote file distribution client program
rdup             generate a file list suitable for making backups
tarsnap          manipulate remote encrypted backups
vbackup          a modular backup program
venti            client for sha1-addressed block storage server
bbackupctl       control the box backup client daemon

CD/DVD/BluRay

mkisofs          create an hybrid iso9660 joliet hfs filesystem
genisoimage      create iso9660/joliet/hfs filesystem
growisofs        combined frontend to cd/dvd/bluray recording program
cdw              frontend to cdrecord/mkisofs/growisofs and other tools
cdrdao           reads and writes cds in disc-at-once mode
cdrecord         burn a cd
xorriso          creates and manipulates iso filesystem with rockridge
bchunk           cd image format conversion from bin/cue to iso/cdr
burn             record from various sources to optical media (cd, dvd)
mp3burn          burn audio cds from mp3, ogg vorbis, or flac files
bashburn         a bash script cd burner writer
mybashburn       burn data cds/dvds and create mp3/ogg/flac
dvdauthor        assembles multiple mpeg into a suitable dvd filesystem
cdparanoia       cdda reading tool with extra data verification features
abcde            a better cd encoder, grabs cd to ogg/speex/mp3/flac/etc
crip             a terminal-based ripper/encoder/tagger tool
jack             rip and encode cds with one command
cdda2ogg         extract audio cd audio tracks and encode them in ogg
cdda2mp3         extract audio cd audio tracks and encode them in mp3
ripit            make flac/ogg/mp3/m4a/aac/als/mp4/mpc/wv/etc from cd
ocp              open cubic music player
cdcd             command driven cd player
cplay            a front-end for various audio players
mcdp             a small cdplayer for linux
workbone         interactive text-mode program for playing audio cd
cdctrl           command line cdrom control
cdeject          ejects the current compact disc
cdclose          closes the cdrom tray
cdir             lists infos about the currently loaded audio cd
cdinfo           print out the audiostatus (playing, etc)
cdpause          pauses/resumes the currently playing compact disc
cdplay           plays the compact disc
cdstop           stops the compact disc
cdvolume         sets the output volume level of the cd player (0-255)
cdshuffle        plays the audio tracks on the disc in random order
cdadd            add information for a new cd to .cdtooldb
cdown            query cddb database for info on a disc

Numbers and Math

qalc             powerful and easy to use command line calculator
bc               an arbitrary precision calculator language
dc               an arbitrary precision calculator
calc             arbitrary precision calculator
mathomatic       a computer algebra system
wcalc            a natural-expression command-line calculator
numfmt           convert numbers from/to human-readable strings
rax2             convert between (signed) int, float, oct, bin and hex
units            convert units from one scale to another
numgrep          the numeric equivilent of the grep utility
numprocess       this program mutates numbers as it encounters them
numsum           take the first numbers on stdin and return the sum
numaverage       find the average of a set of numbers
numbound         find boundary numbers in files or stdin
numnormalize     normalize a set of numbers, by default between 0 and 1
numinterval      show the numeric intervals between each line in a file
numround         rounds off numbers it encounters.
seq              print a sequence of numbers
numrange         print out a range of numbers for use in for loops
jot              print sequential or random data
ent              pseudorandom number sequence test
numrandom        print out a random number
factor           factor numbers
primes           display all primes (primes.pl)
primes.6         generate primes
sc               spreadsheet calculator
gnuplot          an interactive plotting program
maxima           common lisp version of macsyma symbolic mathematics
octave           matlab like language for numerical computations
R                a language for data analysis and graphics

Date and Time

date             print or set the system date and time
cal              displays a calendar and the date of easter
ncal             cal with an alternative layout
gcal             a program for calculating and printing calendars
gcalcli          google calendar command line interface
ddate            convert gregorian dates to discordian dates
pcal             generate postscript or html calendars
saydate          audio date/uptime check
saytime          audio time check

Schedule

sleep            wait for some time
watch            execute a program periodically, showing output
chronic          runs a command quietly unless it fails
wait             await process completion
flock            manage locks from shell scripts
lckdo            run a program with a lock held
shush            run a command and optionally report its output by mail
inotifywait      wait for changes to files using inotify
entr             run arbitrary commands when files change
fsniper          watch directories and apply rules to created files
timeout          run a command with a time limit
crontab          maintain crontab files for individual users
at               executes commands at a specified time
atq              lists the user pending jobs
atrm             remove jobs fom the later execution queue
batch            executes commands when system load levels permit

Office

wordgrinder      console-based word processor
antiword         show the text and images of ms word documents
abook            text-based address book program
hnb              hierarchical notebook
worklog          keeping track of time spent on different projects
tpp              text presentation program
xsw              slide show presentation tool
ledger           command-line accounting
sc               spreadsheet calculator
slsc             s-langauge port of the sc spreadsheet
teapot           table editor and planner
oleo             the gnu spreadsheet program
ssconvert        a command line spreadsheet format converter
ssindex          generate index data for spreadsheet files
ssgrep           search spreadsheets for strings
ssdiff           compare two spreadsheets
dbview           view dbase 3 files
gv               postscript and pdf viewer
xdvi             dvi previewer for the x window system

For note-taking, you might also want to have a look at:

• org-mode
• vimoutliner

Spelling

spell            check spelling in batch
aspell           check spelling interactively
ispell           check spelling in batch or interactively
goldendict       a feature-rich dictionary lookup program
dict             dict protocol client
sdcv             console version of stardict program
aiksaurus        english-language thesaurus
wtf              translates acronyms for you
an               anagram generator
wordplay         anagram finder

Publishing

gs               ghostscript, a postscript and pdf interpreter/previewer
fbgs             postscript/pdf viewer for the framebuffer console
latex            structured text formatting and typesetting
tex              text formatting and typesetting
etex             extended tex
latexdiff        determine and markup differences between two latex files
latexmk          generate latex document
dblatex          convert docbook to latex, dvi, postscript, and pdf
psselect         select pages from a postscript file
mf               metafont, a language for font and logo design
pdftex           pdf output from tex
mutool           all purpose tool for dealing with pdf files
pdfjam           a shell script for manipulating pdf files
pdftk            a handy tool for manipulating pdf
pdfunite         pdf page merger
pdffonts         pdf font analyzer
pdfimages        pdf image extractor
pdfinfo          pdf document information extractor
pdfseparate      pdf page extractor
pdftocairo       pdf to png/jpeg/pdf/ps/eps/svg using cairo
pdftohtml        program to convert pdf files into html, xml and png
pdftoppm         pdf to portable pixmap (ppm) converter
pdftops          pdf to postscript converter
pdftotext        pdf to text converter
diffpdf          compare two pdf files textually or visually

Task Managers

task             taskwarrior, a command line todo manager
tudu             command line hierarchical todo list
remind           a sophisticated reminder service
wyrd             front-end to remind
gcalcli          google calendar command line interface
calcurse         text-based organizer
pal              calendar with events
when             a minimalistic personal calendar program
devtodo          a reminder/task program aimed at developers
tdl              to do list manager
todo.sh          minimal, todo.txt focused task manager
w2do             a simple text-based todo manager
yokadi           commandline todo system
episoder         tv show reminder from epguides.com and thetvdb.com

Conversion

dos2unix         dos/mac to unix text file format converter
isutf8           check whether files are valid utf-8
iconv            convert encoding of given files
recode           converts files between character sets
utf8tolatin1     reads utf-8 encoded text and writes latin1
groff            front-end for the groff document formatting system
troff            the troff processor of the groff text formatting system
nroff            emulate nroff command with groff
deroff           remove roff and preprocessor constructs
eqn              format equations for troff or mathml
neqn             format equations for ascii output
tbl              format tables for troff
col              filter reverse line feeds from input
catdvi           dvi to plain text converter
gv               postscript and pdf viewer
odt2txt          a simple converter from opendocument text to plain text
o3read           dump of an openoffice.org document parse tree
o3tohtml         convert files in openoffice.org format to html
o3totxt          convert files in openoffice.org format to text
catdoc           outputs word doc file content as plain text
docx2txt         convert microsoft ooxml files to plain text
abiword          flexible word processor documents converter
antiword         show the text and images of ms word documents
xls2csv          output ms-excel file as comma-separated values
xlsx2csv         convert xslx xml files to csv format
xlhtml           convert excel xls files to html
ssconvert        spreadsheet format converter (gnumeric)
ppthtml          convert powerpoint ppt files to html
stx2any          converter from structured text to multiple formats
pandoc           general markup converter
unhtml           strip the html formatting
html2text        an advanced html-to-text converter
html2markdown    converts html to markdown-formatted text
asciidoc         converts an asciidoc text file to html or docbook
markdown         convert markdown syntax to (x)html
ttm              tex/latex to mathml converter
txt2tags         text formatting and conversion tool
txt2man          convert flat ascii text to man page format
txt2html         convert plain text file to html
textfmt          convert ascii text to postscript for facsimile
txt2pdbdoc       text to doc file converter for palm pilots
img2txt          convert images to various text-based coloured files
cacaview         ascii image browser
asciiview        a high quality ascii art image viewer
gnuhtml2latex    html to latex converter
csv2latex        convert a csv file into a latex document
sgml2latex       create latex, dvi, ps or pdf output from an sgml file
chm2pdf          a tool convert chm to pdf format
unoconv          convert documents from/to libreoffice format
jodconverter     import/export documents using the libreoffice filters
ps2ascii         ghostscript translator from postscript or pdf to ascii
ps2pdf           convert postscript to pdf using ghostscript
vilistextum      html to ascii converter
wvWare           convert msword documents
rst2pdf          convert restructuredtext documents to pdf

ASCII Art

figlet           display text with an ascii art charset
toilet           display large colourful characters
cowsay           configurable speaking/thinking cow (and a bit more)
cadubi           creative ascii drawing utility
lolcat           rainbow coloring for text
cacaview         ascii image browser
asciiview        a high quality ascii art image viewer
linux_logo       color ansi penguin logo with system information
screenfetch      the bash screenshot information tool

Images

fbi              framebuffer imageviewer
fim              fbi (linux framebuffer imageviewer) improved
findimagedupes   finds visually similar or duplicate images
identify         describes the format and characteristics of images
fbgrab           takes a screenshot using the framebuffer device
gifsicle         manipulates gif images and animations
pngcrush         optimizes, or modifies, png files
optipng          advanced optimization program for
gm               graphicsmagick is a set of tools to manipulate images
convert          convert/resize/blur/crop/despeckle/dither/etc image
mogrify          inplace convert/edit/resize/blur/crop/etc an image
icotool          convert and create win32 icon and cursor files
rdjpgcom         display text comments from a jpeg file
wrjpgcom         insert text comments into a jpeg file
cjpeg            compress an image file to a jpeg file
djpeg            decompress a jpeg file to an image file
jpegtran         lossless transformation of jpeg files
jp2a             convert jpeg images to ascii
exif             shows exif information in jpeg files
exiftool         read and write meta information in media files
exiftran         transform/rotate digital camera jpeg images
exifcom          set/display user comment tag contained in a jpeg exif
exiftags         output the properties contained in a jpeg exif section
exiftime         display/adjust the date and time exif tags
exifprobe        probe and report exif structure and metadata content
exifgrep         select and reformat the output of exifprobe
jhead            digicam jpeg exif header manipulation tool
gle              graphics layout engine
simple-scan      scanning utility
scanimage        scan an image
gocr             command line text recognition tool
tesseract        command-line ocr engine
album            themable html photo album generator
gphotofs         filesystem to mount digital cameras
qrencode         encode  data  in a qr code as a png or eps image

Vector Graphics

dot              filter for drawing directed graphs
neato            filter for drawing undirected graphs
twopi            filter for radial layouts of graphs
circo            filter for circular layout of graphs
fdp              filter for drawing undirected graphs
sfdp             filter for drawing large undirected graphs
patchwork        filter for tree maps
asy              asymptote: a script-based vector graphics language
inkscape         svg (scalable vector graphics) editing program
rasterizer       svg conversion to png, jpeg and pdf
potrace          transform bitmaps into vector graphics

3D

aqsis          aqsis renderer adhering to the renderman standard
povray         the persistence of vision ray tracer

Videos

mplayer          video/audio player/streamer
mencoder         video decoding, encoding and filtering tool
vlc              video lan client, a media player/streamer/transcoder
xine             a free video player
xine-remote      a small tool to connect xine remote control server
avplay           avplay media player
avconv           avconv video converter
avprobe          avprobe media prober
avidemux         a free video editor
mpgtx            manipulate mpeg files
mplex            mpeg 1/2 program/system stream multiplexer
ffmpeg           ffmpeg video converter
mediainfo        display information about audio/video files
imdb               calls any of the imdb functions
imdb-get           looks up imdb data for a film
imdb-link          links films based on their genre
imdb-rename        renames files based on their title
imdb-fxd           creates fxd files from the imdb cache for freevo
imdb-update-cache  updates the imdb cache for a given directory

Audio and Music

mplayer          video/audio player/streamer
vlc              video lan client, a media player/streamer/transcoder
sox              the swiss army knife of audio manipulation
oggenc           encode audio into the ogg vorbis format
flac             encoding, decoding, testing and analyzing flac streams
lame             create mp3 audio files
mediainfo        display information about audio/video files
exfalso          tag editor for mp3/ogg/flac/musepack/wavpack/mod/xm/it
id3              id3 tag editor
id3v2            add/change/remove/view id3v2 tags, converts/lists id3v1
id3tool          a command line editor for id3 tags
id3ed            edit id3 description tags in mpeg3 files
mussort          sort music files into folders

Audio Players

mplayer          video/audio player/streamer
vlc              video lan client, a media player/streamer/transcoder
ocp              open cubic music player
mpc              program for controlling music player daemon (mpd)
ncmpc            curses music player daemon (mpd) client
audtty           control audacious from cli with a ncurses interface
xmms2            command-line interface to the xmms2 daemon
cmus             curse music player
moosic           a command-line client for the moosic jukebox system
play             sox invoked as play outputs to the default sound device
bplay            buffered sound playing
ogg123           plays ogg vorbis files
mpg123           play audio mpeg 1.0/2.0/2.5 stream (layers 1, 2 and 3)
mpg321           simple and lightweight command line mp3 player
splay            mpeg-1,2 audio layer 1,2,3 file player
madplay          decode and play mpeg audio stream(s)
audiopreview     play audio, video, and internet media streams
herrie           interactive music playlist player
mp3blaster       an interactive text-console based mp3 player
mocp             console audio player
mpc123           your handy musepack audio player
orpheus          text mode menu and window-driven audio player
pytone           music jukebox for your audio files
yauap            audio player based on the gstreamer framework
mikmod           play soundtracker modules on a unix machine
xmp              extended module player
cdcd             command driven cd player
cplay            a front-end for various audio players
mcdp             a small cdplayer for linux
workbone         interactive text-mode program for playing audio cd
shell-fm         console-based player for last.fm radio streams

Audio Editing

sox              the swiss army knife of audio manipulation
ecasound         sample editor, multitrack recorder, fx-processor, etc
rec              sox invoked as rec set default sound device as input
brec             buffered sound recording
snd              a sound editor
gramofile        sample and process analog recordings
quelcom          command line editing tools for mp3 and wav files
qmp3check        check and clean mp3 streams
qmp3cut          extract, delete parts of a mp3 file
cutmp3           a fast and leightweight mp3 editor
fadecut          rip audiostreams, cut, fade in/out and tag audiofiles
qmp3info         show info from mp3 files
arename          automatically rename audio files by tagging information
qmp3join         join mp3 files
qmp3report       report mp3 files and directories
qwavinfo         show info from wav files
qwavjoin         join wav files
qwavcut          extract, delete parts of a wav file
qwavsilence      detect and shrink silence sequences in wav files
qwavfade         fade in/out wav files
qwavheaderdump   dump and fix wav headers
normalize-audio  adjusts volume levels of audio files

Midi

timidity         midi-to-wave converter and player
pmidi            midi file player for alsa
playmidi         full-featured midi player using the voxware driver
arecordmidi      record standard midi files
abc2midi         converts abc file to midi
midi2abc         program to convert midi format files to abc notation
abcm2ps          translate abc music notation to postscript or svg

Text to Speech

espeak           a multi-lingual software speech synthesizer
festival         a text-to-speech system
saydate          audio date/uptime check
saytime          audio time check

Games

adventure        an exploration game
nethack          exploring the mazes of menace
slashem          exploring the mazes of menace
rogue            exploring the dungeons of doom
crawl            the roguelike game of crawl
battlestar       a tropical adventure game
phantasia        an interterminal fantasy game
wump             hunt the wumpus in an underground cave
bastet           tetris(r) clone with "bastard" block-choosing ai
pytris           two players console tetris game
tetris-bsd       the game of tetris
greed            eat a game field until you run out of moves
moon-buggy       drive some car across the moon
ninvaders        ncurses version of space invaders
overkill         bloody 2d action deathmatch-like game in ascii-art
worm             play the growing worm game
snake            display chase game
atc              air traffic controller game
robots           fight off villainous robots
hunt             a multi-player multi-terminal game
wargames         shall we play a game?
canfield         the solitaire card game canfield
cribbage         the card game cribbage
mille            play mille bornes
monop            monopoly game
backgammon       the game of backgammon
sail             multi-user wooden ships and iron men
trek             trekkie game
boggle           word search game
hangman          computer version of the game hangman
gtypist          typing tutor for different keyboards and languages
arithmetic       quiz on simple arithmetic
quiz             random knowledge tests
fortune          print a random, hopefully interesting, adage
display-dhammapada  display a verse from the dhammapada

Screensavers

cmatrix          simulates the display from the matrix movie
rain             animated raindrops display
tty-clock        a terminal digital clock
binclock         prints time in binary format

Other

echo             display a line of text
printf           format and print data
getopt           parse command options
expect           automate applications accessed over a terminal
expr             evaluate expressions
yes              output a string repeatedly until killed
true             do nothing, successfully
false            do nothing, unsuccessfully
ifetch           image collection tool for ip cameras of ifetch-tools
rig              random identity generator
pwgen            generate pronounceable passwords
makepasswd       generate and/or encrypt passwords
pwsafe           password database utility
gringotts        secure password and data storage manager
clamscan         scan files and directories for viruses
llines           lifelines genealogy program, gedcom format

X Windows

xinput           utility to configure and test x input devices
xvidtune         adjust x server origin and size
xcalib           tiny monitor calibration loader for x
xev              x event viewer
setxkbmap        set the keyboard using the x keyboard extension
xmodmap          set/modify keymaps and pointer button mappings in x
xhost            server access control program for x
xsetroot         root window parameter setting utility for x
import           window/screenshot
xset             user preference utility for x
xrdb             x server resource database utility
appres           list x application resource database
listres          list resources in widgets
editres          a dynamic resource editor for x toolkit applications
xlsfonts         server font list displayer for x
xfontsel         point and click selection of x11 font names
xfd              display all the characters in an x font
fc-scan          scan font files or directories
fc-cache         build font information cache files
fc-cat           read font information cache files
fc-list          list available fonts
fc-query         query font files
fc-match         match available fonts
fc-pattern       parse and show pattern
mimeopen         open files by mimetype
xdg-open         opens a file or url in the user preferred application
exo-open         open urls and launch preferred applications (xfce)
gnome-open       open files and urls using the gnome file handlers
dmenu            dynamic menu, manages huge numbers defined menu items
notify-send      a program to send desktop notifications
xmessage         display a message/query in a window (x-based /bin/echo)
dialog           display curses dialog boxes from shell scripts
kdialog          show kde dialog boxes from shell scripts
zenity           display gtk+ dialogs
osd_cat          x on-screen file displayer
xclip            command line interface to x selections (clipboard)
xclipboard       x clipboard client
devilspie        perform actions on windows as they are created
xdotool          command-line x11 automation tool
xnee             records, replays x11 data on multiple displays
xbindkeys        grab key and mouse events in x and starts shell commands
xte              generates fake input using the xtest extension
x2x              use keyboard and mouse from an x display on antoher x
wmctrl           interact with a ewmh/netwm compatible x window manager
xtrlock          lock X display until password supplied
dbus-send        send a message to a desktop bus
dbus-monitor     debug probe to print desktop bus messages
qdbus            a communication-interface for qt-based applications
xrandr           primitive command line interface to randr extension
xprop            property displayer for x
xdpyinfo         display information utility for x
xwininfo         window information utility for x
xdriinfo         query configuration information of dri drivers
xvinfo           print out x-video extension adaptor information
glxinfo          show information about the glx implementation
Xvfb             virtual framebuffer x server without the hardware
trash            trash utility compliant with freedesktop.org
trash-list       list trashed files
trash-restore    restore for command line trash utility
trash-empty      empty for command line trash utility
xmag             magnify parts of the screen

Funny

axe              tools to improve network performance via snip
baby             create new process from two parents
bosskill         send a signal to your boss, or terminate your boss
c                genericised softdrink generator (coffee, coke etc)
celibacy         don't have sex
chainsaw         tools to improve network performance via snip
chastise         library function to punish users
condom           protects against viruses and child processes
ctluser          control lusers
cutter           tools to improve network performance via snip
egrope           massage a file for a while
fgrope           massage a file for a while
flame            reply to usenet news posting automatically
flog             speed up a process
gong             evaluate process performance
grope            massage a file for a while
guru             system administration
knife            tools to improve network performance via snip
lart             luser attitude readjustment tool
luser            process to control the clueless individuals
normality        defines types of normality different users may have
nuke             launch nuclear weapons at mapped usenet sites
party            set os responses mode
people           fetch a list of all ttys behaving like a human
pmsd             periodically manic system daemon
rescrog          change something, make it different
rtfm             a response for easy questions from clueless lusers
sex              have sex
slave            a semi-interactive command for the dirty work
strfry           string operation
sysadmin         responsible  for everything imaginable
think            you dont have to think, computers can think for you
tm               meditate
uubp             unix-to-unix beer protocol
whack            mangle requests to a printer or damage a printer
xkill            kill processes or users, including usenet poster
xlart            interactive x interface to rlart

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