Supporting Books
Once you have mastered Ubuntu Linux, you may be interested in learning more about Linux and its other distributions. You can take your skills to the next level using the following books, which range from beginner to advanced level:
Linux in a Nutshell, Sixth Edition (http://oreilly.com/catalog/9780596154493) by Ellen Siever, Stephen Figgins, Robert Love, and Arnold Robbins (O’Reilly)
Bash Cookbook: Solutions and Examples for bash Users (http://oreilly.com/catalog/9780596526788) by Carl Albing, JP Vossen, and Cameron Newham (O’Reilly)
Linux System Administration (http://oreilly.com/catalog/9780596009526) by Tom Adelstein and Bill Lubanovic (O’Reilly)
Linux System Programming (http://oreilly.com/catalog/9780596009588) by Robert Love (O’Reilly)