Setting Environment Variable in LINUX

Environment variables in LINUX are basically the shell variable used to set configuration options and customize the shell environment under Linux. 



Display Environment variables

    $ env

Here is the syntax of setting environment variables 

Syntax: export Environment_Variable_Name=Value Example

    export JAVA_HOME=/nhin/jdk/jdk1.7.0_02    

Note: Setting environment variables using export command are limited to the session. If Session is closed then these environment variables are gone. 

To save the environment variables permanently we need to save them in profile file

    $ vi /etc/profile

and add environment variables in this file and save the changes. 

Your environment variable is saved permanently.