Bashrc

• Function to add alias of command:

  function addalias(){
     echo -e "adding alias $1 for $2\n"
     echo -e "alias ${1}=\"${2}\"" >> ~/.bashrc
     . ~/.bashrc
  }
  

  Usage : addalias <nameofalias> “<command>”

• Function to find newly installed python module working:

  function import(){
     python -c "import ${1}" 2> /dev/null
     [ $? -eq 0 ] && echo -e "Python module ${1} installed properly" || \
     echo -e "Python module ${1} is missing or perhaps mispelled"
  }
  

  Usage : import <name_of_python_module>

• Function to mkdir and cd into directory:

  function mkcd () {
    mkdir -p "$@" && eval cd "\"\$$#\"";
  }
  

  Usage : mkcd abc

• Function to show IP of all connections

  function ips () {
          local interface=""
          local types='vmnet|en|eth|vboxnet|wlan|wl|tap|tun'
          local i
                  for i in $(
                          ifconfig \
              | egrep -o '(^('$types')[0-9]|inet (addr:)?([0-9]+\.){3}[0-9]+)' \
              | egrep -o '(^('$types')[0-9]|([0-9]+\.){3}[0-9]+)' \
          | grep -v 127.0.0.1
                  ); do
                  if ! [ "$( echo $i | perl -pi -e 's/([0-9]+\.){3}[0-9]+//g' )" == "" ]; then
                          interface="$i":
                  else
                          echo $interface $i
                  fi
                  done
  }
  

  Usage: ips

• Function to check “Are you root ?”:

  chk_root () {
          if [ ! $( id -u ) -eq 0 ]; then
                  echo -e "Must be run as root"
                  exit
          fi
  }
  

  Usage: Just use chk_root in script