Environment Variables in Linux

Linux Environment variable is a dynamic-named value, which may be used by one or more programs running. It can also be defined as a set of Rules and Values to build an environment.

Syntax: VARIABLE_NAME=VALUE

How to view Environment Variables?

• To view all the environment variables

  Syntax: #printenv or env

• To view only one environment variable

  Syntax: #echo $variable_name

How to set Environment Variables?

• To set the environment variable temporary

  Syntax: export TESTVAR=1

• To set the environment variable permanently
  • First open up the .bashrc file
  • set the Environment variable
  • run source .bashrc