IP capture and public IP. (Script Shell) Linux terminal

catch_ip

#!/bin/bash
#
# Description: Simple script (shell) for view your IP and IP Public.
# By: William Canin <williamcanin.com> {william.costa.canin@gmail.com}
#
# Package dependencies:
# > net-tools
# > lynx

# Network interface card. Example: eth0, eth1, enp19s0, wlan0, wlan1, wlp7s0,... etc.
INET_FACE=""

# Form 1 for Arch Linux, CentOS, Fedora and derivatives.
# IP=$(ifconfig $INET_FACE | awk '/inet/ {sub(/:/," "); print $2}' | sed '2d')
# Form 2 for Debian, Ubuntu and derivatives.
#IP=$(ifconfig $INET_FACE | grep "inet end" | awk -F: '{ print $2 }' | awk '{ print $1 }')
# Form 3 Extra - If the above does not work out.
# IP=$(ifconfig $INET_FACE | awk -F: '/inet addr/{ print $2 }' | awk '{ print $1 }')


# Do you need a connection to the internet.
# PUBLIC_IP=$(lynx -dump -hiddenlinks=ignore -nolist http://checkip.dyndns.org:8245/ | awk '{ printf $4 }')

# Show
if [[ ! -z "$INET_FACE" ]]; then

  if [[ ! -z "$IP" ]]; then
    printf "\nYour IP: $IP\n"
  else
    printf "\nVariable 'IP' null or comment.\n"
  fi
  if [[ ! -z "$PUBLIC_IP" ]]; then
    printf "Your IP Public: $PUBLIC_IP\n\n"
  else
    printf "\nVariable 'PUBLIC_IP' null or comment.\n\n"
  fi

else
  printf "\nVariable 'INET_FACE' null.\n\n"
fi