shamil

Client-side SSL

Create a Certificate Authority root (which represents this server)

Organization & Common Name: Some human identifier for this server CA.

openssl genrsa -out ca.key 2048
openssl req -new -x509 -days 365 -key ca.key -out ca.crt

Create the Client Key and CSR

shamil

def compile_asset?(path)
  # ignores any filename that begins with '_' (e.g. sass partials)
  # all other css/js/sass/image files are processed
  if File.basename(path) =~ /^[^_].*\.\w+$/
    puts "Compiling: #{path}"
    true
  else
    puts "Ignoring: #{path}"
    false
  end

shamil

Use folowing steps to repackage dep package:

1: Extract deb package
    # dpkg-deb -x <package.deb> <dir>

2: Extract control-information from a package
    # dpkg-deb -e <package.deb> <dir/DEBIAN>

3. After completed to make changes to the package, repack the deb
    # dpkg-deb -b <dir> <new-package.deb>

shamil

# Show all grants
mysql --skip-column-names -e "SELECT user, host FROM mysql.user" | sed 's/\t/"@"/g; s/^/SHOW GRANTS FOR "/g; s/$/";/g;' | mysql --skip-column-names

shamil

# how to redirect from one port to another using iptables
###

# install following package in order to preserve the iptables rules
sudo apt-get install iptables-persistent

# redirect from port 80 to port 8000
sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8000

# redirect from one IP to other

shamil

how to install nagios3 with mod-gearman on Ubuntu

configure apt to not install sugested and recommended packages

sudo tee /etc/apt/apt.conf.d/02recommends <<END
APT::Install-Recommends "0";
APT::Install-Suggests "0";
APT::AutoRemove::RecommendsImportant false; # optional
END

shamil

#System wide associations:

    sudo sed -i 's/gedit.desktop/yournew.desktop/g' /usr/share/applications/defaults.list

# Just your user's associations:

    sed -i 's/gedit.desktop/yournew.desktop/g' ~/.local/share/applications/mimeapps.list

# If you're using the PPA for Sublime Text 2, there is already a .desktop file for it
# sitting in `/usr/share/applications/` so you can just run:

shamil

#!/usr/bin/env ruby1.8

class Workaround
  def initialize target_pid
    @target_pid = target_pid

    first_child
  end

  def first_child

shamil

$ augtool
> set /augeas/load/Spacevars/incl[last()+1] "/etc/redis/redis.conf"
> load
> print /files/etc/redis/redis.conf

shamil

function uuid() {
  var uuid = "", i, random;
  for (i = 0; i < 32; i++) {
    random = Math.random() * 16 | 0;

    if (i == 8 || i == 12 || i == 16 || i == 20) {
      uuid += "-"
    }
    uuid += (i == 12 ? 4 : (i == 16 ? (random & 3 | 8) : random)).toString(16);
  }