Getting Started with BASH / BASH Programming - Introduction HOW-TO

"The GNU Bourne-Again SHell (BASH) incorporates features from the C Shell (csh) and the Korn Shell (ksh) and conforms to the POSTIX 2 shell specifications. It provides a Command Line Interface (CLI) for working on *nix systems and is the most common shell used on Linux systems. Useful bash features will be the subject of the rest of this document."

http://www.hypexr.org/bash_tutorial.php



"This article intends to help you to start programming basic-intermediate shell scripts. It does not intend to be an advanced document (see the title). I am NOT an expert nor guru shell programmer. I decided to write this because I'll learn a lot and it might be useful to other people. Any feedback will be appreciated, specially in the patch form :)"

http://www.faqs.org/docs/Linux-HOWTO/Bash-Prog-Intro-HOWTO.html