Main points on BASH (Bourne-Again SHell)

BASH is a command language interpretor for Linux.
BASH was developed by GNU Project.
BASH is backward compatible with sh shell.
BASH has also incorporated various features from C Shell as well as Korn Shell.

BASH Files

/etc/profile : It is a systemwide initialization file which is executed when using login shells.
/etc/bash.bashrc : It is systemwide BASH startup file. Runs when we start BASH for the the first time in our system after turning it on.
/etc/bash.logout : It is systemwide BASH cle...