Linux Pocket Guide

This is definitely a great companion for any Linux administrator or hobbyist who is trying to become a level 60 command line warrior. There are plenty of commands to familiarize yourself with, and they are grouped logically (rather than alphabetically), which means that when you look up a command, you can find other similar commands in the same section. This book was written with Fedora Core Linux in mind, so it may not cover some of the commands unique to other Linux distros.

These book includes most used unix commands. One step more explanatory than man pages. With its small size, it's very appropriate for reading while travelling with bus or metro.
But this is not a complete reference book, for advanced users.

This book is exactly the type of excellent work one comes to expect from O'Reilly. Tons on useful information in a handy pocket reference size. I bought it because I had been away from Linux for awhile and was rusty on all of the commands. This filled the bill perfectly.

A good, standard handbook for Fedora and other Linux flavors. A good reference when you already know the OS and need a reference back to refresh your memory on command syntax, etc

This book has helped me to have a better understanding of the Linux commands.