Customize bash

View environment variables for the current shell

Allow child shell sessions to use an environment variable

By default dieplay all bash environment settings, veriables and functions. Also, it is used to enable and disable bash settings.

Remove of an environment variable alogs with it's value

Used to create a shortcuts to a longer command, typically with options

It is a bash function keyword that it is any custom list of commands that user can use in bash shell

. (dot character) or source
parse or apply settings from a file into the current bash session or script

PATH environment variable
environment variable that defines where application can be found by the bash shell without specifying their full path