A Brief Introduction
Bash or Bourne again shell is a replacement to the original unix shell written by Stephen Bourne at Bell Labs.
It offers vast improvements over the original shell, which include
Integer arithmetic,
Indexed arrays,
Command line editing,
Unlimited command history.
Bash scripts are available by default on most Linux distributions.
http://techarena51.com/index.php/a-beginners-guide-to-bash-scripting/
