Oswald Campesato 
Linux Shell Programming Pocket Primer [PDF ebook] 

The goal of this book is to introduce readers to an assortment of powerful command line utilities that can be combined to create simple, yet powerful shell scripts. While all examples and scripts use the “bash” command set, many of the concepts translate into other forms of shell scripting (ksh, sh, csh), including the concept of piping data between commands, regular expression substitution and the sed and awk commands. Aimed at a reader relatively new to working in a bash environment, the book is comprehensive enough to be a good reference and teach a few new tricks to those who already have some experience with creating shell scripts.
FEATURES:

• Covers extensive topics, code samples, and scripting utilities


• Includes material on piping data between commands, regular expression substitution, cleaning datasets, and the sed and awk commands


• Features companion files with code samples from the book (available for downloading from the publisher)