Different methods to find your public ip address using cli in linux

Whether you are network engineer or a Linux System Administrator doesn't matter you always need to know the public ip address of your network , Private ip address of any Linux machine can be easily seen using ifconfig command line tool or show ip address command but when it comes to find the public ip address it sometimes become very difficult situation if you are using a Linux operating system and you are using cli mode of linux.
THIS TUTORIAL IS ALL ABOUT HOW TO FIND PUBLIC IP ADDRESS IN LINUX MACHINE.I HAVE INCLUDED APPROX ALL THE DIFFERENT COMMAND LINE TOOL OR METHODS TO SEE THE PUBLIC IP ADDRESS USING CLI IN LINUX.