beli-sk

# show commit tree (possibly append --all for all branches)
git log --graph --oneline --decorate
# save previous as an alias and then just use 'git tree'
git config --global alias.tree "log --graph --oneline --decorate"

# restoring lost commit (e.g. after git reset --hard HEAD~1)
git fsck --lost-found
# or
git reflog
git merge <hash>

beli-sk

SSLCipherSuite ECDHE:DHE:HIGH:+SHA1:!MEDIUM:!LOW:!EXP:!aNULL:!eNULL:!PSK:!RC4
SSLHonorCipherOrder on
SSLProtocol all -SSLv3

<VirtualHost ...>
  SSLEngine on
  Header always set Strict-Transport-Security "max-age=15552000"
  Header set Public-Key-Pins "pin-sha256=\"yiUxVRHwMNoXtZZS/RtgPr2bCNyc6L8IJrmTU80HSlA=\"; pin-sha256=\"XQIfp7PhqFyw93tHv86EhngOxSVVdZy0Dj1mFmI81PM=\"; max-age=15552000"
  SSLUseStapling on
  ...

beli-sk

# Number of open file descriptors per process (replace 'httpd' with process name)
lsof -p $( echo `ps -o pid= -C httpd` | tr ' ' ',' ) | awk '{ print $2 }' | uniq -c

# Show swap usage per process, >=1000 kB
cat /proc/*/status | egrep -B30 '^VmSwap:[[:space:]]+[[:digit:]]{4,}' | egrep '^Name|^Pid|^VmSwap'

# generate password
head -c12 /dev/urandom | base64 | tr '+/' '_-' | tr -d '='

# days to web server certificate expiry

beli-sk

# https://www.zabbix.com/forum/showthread.php?t=43550
policy_module(zabbix-fix, 1.3)

require {
 type zabbix_agent_t;
 type zabbix_t;
 type ping_t;
 type zabbix_tmp_t;
 class tcp_socket name_connect;
}

beli-sk

Show process list:

SELECT * FROM pg_stat_activity;

Show running processes:

SELECT pid,datname,query_start,state,query
FROM pg_stat_activity WHERE state <> 'idle';

Reload config:

beli-sk

#!/usr/bin/gnuplot
U = 3.3
I = 2.2e-3
R = U/I
C = 10e-6
t = 0.01
set yrange [0:U]
set xrange [0:t]
plot U * exp(-x/(R*C))
pause -1

beli-sk

Keybase proof

for beli (https://keybase.io/beli) @keybase

with PGP fingerprint 05ED 7B6D 4DDA E43D DB92 1AEC A537 2D08 32D8 419D

{
    "body": {
        "key": {

beli-sk

colorscheme evening
set columns=120 lines=35
"set guifont=Inconsolata\ 13

beli-sk

# for building packages
apt-get install build-essential devscripts debhelper
# for creating/editing packages
apt-get install dh-make quilt

cat >>~/.bashrc <<"_EOF"
DEBEMAIL="your.email.address@example.org"
DEBFULLNAME="Firstname Lastname"
export DEBEMAIL DEBFULLNAME
alias dquilt="quilt --quiltrc=${HOME}/.quiltrc-dpkg"

beli-sk

#set -g status off
#set -g status-right "\"#{=32:pane_title}\""
setw -g mode-keys vi
unbind [
bind Escape copy-mode
unbind p
bind p paste-buffer
bind-key -T copy-mode-vi 'v' send-keys -X begin-selection
bind-key -T copy-mode-vi 'y' send-keys -X copy-selection-and-cancel
bind-key S setw synchronize-panes