CONFIGURATION

How to add environment variables?

To set variable only for current shell:

VARNAME="my value"

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.

You can also add some special paths to PATH.

export ANDROID_STUDIO_HOME="/home/lester/Android/android-studio_pre/bin"

export PATH="${ANDROID_STUDIO_HOME}:$PATH"