Useful Unix commands (including postgres & redis related)

useful_Unix_cmds.sh

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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PROJECT INFO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#display name of current git branch [TOADD]
alias curbranch="git branch | grep '\*'" 

#output a divider to the cli [TOADD]
alias clidivider="echo '======================================'"

#provides the current directory name - without the full path [TOADD]
alias curdir="pwd | rev | cut -d'/' -f1 | rev"

#info about the current project: current git branch, project folder [TOADD]
alias curproj="echo ''; clidivider; echo 'CURRENT PROJECT:'; curdir; clidivider; echo ''; clidivider; echo 'CURRENT GIT BRANCH:'; curbranch; clidivider"

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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SYSTEM UTILS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#
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#count number of results a search returns
alias countf="find . | wc -l"

#trim whitespace before terminal output & condense large spaces into small ones [TOADD]
function trim {
    awk '{$1=$1};1'
}

#make a file accessible to everyone
alias mkshared="sudo chmod -R a+rwxXst"

#find process running on a given port [TOADD]
alias pidofport="sudo netstat -nlp | grep" #port number here

#get size of a file, or total size of a directory + all subdirectories
alias fsize='du -chs'

alias lsa="ls -all"
alias lsd="lsa | grep '^d' | grep -v '\s\.\.\?$'"
alias lsf="lsa | grep -v '^d'"

## [see **]
alias ..="cd .."
alias ...="cd ..; cd .."
alias ....="cd ..; cd ..; cd .."
alias .....="cd ..; cd ..; cd ..; cd .."
alias ......='cd ..; cd ..; cd ..; cd ..; cd ..'
alias .......='cd ..; cd ..; cd ..; cd ..; cd ..; cd ..'
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NODEJS ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#
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#enables completion for npm commands in cli - place as is in .bash_profile file
. <(npm completion)

#kill all node processes
alias killnode="ps axu | grep node | cut -d' ' -f3 | grep '$' | sudo xargs kill -9"

#kill all gulp processes
alias killgulp="ps axu | grep gulp | cut -d' ' -f3 | grep '$' | sudo xargs kill -9"

#kill all nodemon processes
alias killnodemon="ps axu | grep nodemon | cut -d' ' -f3 | grep '$' | sudo xargs kill -9"

#kill all npm processes
alias killnpm="ps axu | grep npm | cut -d' ' -f3 | grep '$' | sudo xargs kill -9"

#kill all node-related processes
alias nukenode="killnode; killgulp; killnodemon; killnpm"

#list all node modules currently installed, and the location they're stored
alias nodelist="ls /usr/local/lib/node_modules/; echo '-------------------------------------'; echo 'global node modules location:'; echo '/usr/local/lib/node_modules/'; echo '-------------------------------------';"

#find version of globally installed npm package
alias npmpv="npm list -g | grep"

#information about npm and node modules [TOADD]
alias npminfo="npm config list"

#list all globally installed node modules [TOADD]
alias npmglist="npm list -g --depth=0"

#output the npm info I care the most about [TOADD]
alias npmkeyinfo="npm config ls -l | grep 'userconfig\|loglevel\|init-module\|cache\s\|^prefix\|shell\|node\-version\|globalignorefile\|globalconfig\|editor\|color' | rev | cut -d';' -f1 | rev | trim; npm config list | grep 'HOME\|cwd\|bin' | rev | cut -d';' -f1 | rev | trim"
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#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PROCESSES ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#EXAMPLES
#
#find all postgres processes running
ps axu | grep postgres

#find all redis processes running
ps axu | grep redis

#find all terminal processes running
ps axu | grep redis

#return pids of all processes running (pids, and only pids - nothing else)
ps axu | grep '\n' | awk '{ print $2 }'

#kill every process remotely related to postgres
ps axu | grep postgres | cut -d' ' -f3 | grep '$' | sudo xargs kill -15

#kill every process remotely related to redis
ps axu | grep redis | cut -d' ' -f3 | grep '$' | sudo xargs kill -15

#find all unique ids of port 3002 processes, with a name containing "node"
lsof | grep '3002' | grep node | cut -d' ' -f3 | grep -v '^$' | uniq | sudo xargs kill -9

#

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# this magic command:::   sed -e 's/^\s*//' -e '/^$/d'   ::: removes whitespace from the start of the output
# this magic command:::   awk '{ print $2 }'             ::: only outputs the second column of a table
# this magic command:::   awk '{ print $1" "$2 }'        ::: outputs  1st & 2nd columns of a table, with a single space in between

#find all directories a postgres executable can be found
whereis postgres | cut -d' ' -f2- --output-delimiter=$'\n'

#install XTerm2 from command line only (this one === OSX, not Unix per se; more of a "model" than useful command on its own)
mkdir ~/temp_dwl; curl https://iterm2.com/downloads/stable/iTerm2-2_1_1.zip > ~/temp_dwl/iTerm2.zip; mkdir ~/temp_dwl/iTerm2dir; unzip -l ~/temp_dwl/iTerm2.zip -d ~/temp_dwl/iTerm2; sudo mv iTerm2/iTerm.app /Applications/

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#~~~~~~~~~~~~~~~~~~~~~~~~ CLEVER BUT POSSIBLY DANGEROUS ~~~~~~~~~~~~~~~~~~~~~~~~
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#create a permanent new path variable. example usage: new-path-var-2 /asdf  <-- adds /asdf to PATH
function new-path-var-2 {
    rm ~/.bashrc_tmp2 2>/dev/null
    cat .bashrc | grep -v "^PATH=" | grep -v "^export PATH" > ~/.bashrc_tmp2; 
    echo 'export PATH='$PATH':'${1} >> ~/.bashrc_tmp2
    mkdir -p ~/temp_bk
    rm ~/temp_bk/.bashrc3 2>/dev/null
    mv ~/temp_bk/.bashrc2 ~/temp_bk/.bashrc3 2>/dev/null 
    mv ~/temp_bk/.bashrc ~/temp_bk/.bashrc2 2>/dev/null
    mv ~/.bashrc ~/temp_bk/.bashrc 2>/dev/null
    mv ~/.bashrc_tmp2 ~/.bashrc
    . ~/.bashrc
    echo "new path:\n"
#    $(echo 'export PATH='$PATH':'${1})
    echo 'export PATH='$PATH':'${1}
}



#[**] - regarding the '..', '...', '....', '.....' etc. aliases:
#
# Save 3-18 key presses 1000X / day, and if it takes 0.01s/press...
# = ~100s/day saved. 
# 100s * 300 days of typing in a year = 30,000s / year
# 50 years of typing = 30,000 * 50 = 150,000s total
# 150,000 / 60 / 60 = ~41.7hrs 
# ~41.7hrs minus 15min (to come up with, code, write, & post this) = ~41.45hrs 
# === ~2.5 (waking hour) days saved in a lifetime
# This excludes the 'train of thought' factor (more time typing 
#   after coming up with thought = less fluid train of thought)
# ...also it was fun.