The Bash Guide for Beginners gets you started with Bash scripting and bridges the gap between the Bash HOWTO and the Advanced Bash Scripting Guide. Everybody who wants to make life easier on themselves, power users and sysadmins alike, can benefit from reading this practical course. The guide contains lots of examples and exercises at the end of each chapter, demonstrating the theory and helping you practice. Bash is available on a wide variety of UNIX, Linux, MS Windows and other systems.
Download: The Linux Documentation Project