How do I add environment variables
to access the environment variable, use
$ dollar sign as prefix, e.g.
To set variable only for current shell:
To set it for current shell and all processes started from current shell:
export VARNAME="my value" # shorter, less portable version
To set it permanently for all future bash sessions add such line to your
.bashrc file in your $HOME directory.
To set it permanently, and system wide (all users, all processes) add set variable in /etc/environment:
gksudo gedit /etc/environment
You need to logout from current user and login again so environment variables changes take place.