Does a reverse lookup on a domain name's IP address.

.profile-digr.sh

# Add this file to your home directory then include it in ~/.profile using `. ~/.profile-digr.sh`
 
digr() {
  for arg; do
    echo -e "\033[38;5;244m*\033[0m $arg";
    for DIGR_IP in $(dig +short $arg); do
      echo -e "    \033[38;5;244m↳ \033[0m" $DIGR_IP;
    done;
    if [[ "$DIGR_IP" != "" ]]; then
      for DIGR_PTR in $(dig +short -x $DIGR_IP); do
        echo -e "    \033[38;5;244m↵ \033[0m" $DIGR_PTR;
      done;
      if [[ "$DIGR_PTR" == "" ]]; then
        echo -e "    \033[38;5;244m↵ \033[0m \033[31mPTR NOT FOUND\033[0m";
      fi;
      unset DIGR_PTR;
    else
      echo -e "    \033[31m(╯°□°）╯︵ ┻━┻  NOT FOUND\033[0m";
    fi;
    unset DIGR_IP;
  done;
}