Bash Pocket Reference: Help for Power Users and Sys Admins, Edition 2

Effective awk Programming: Universal Text Processing and Pattern Matching, Edition 4

sed and awk Pocket Reference: Text Processing with Regular Expressions, Edition 2

vi Editor Pocket Reference

Unix in a Nutshell: A Desktop Quick Reference - Covers GNU/Linux, Mac OS X,and Solaris, Edition 4

Classic Shell Scripting: Hidden Commands that Unlock the Power of Unix

Learning the Korn Shell: Unix Programming, Edition 2

sed & awk: UNIX Power Tools, Edition 2

GDB Pocket Reference: Debugging Quickly & Painlessly with GDB

vi and Vim Editors Pocket Reference: Support for every text editing task, Edition 2

Learning the vi and Vim Editors: Power and Agility Beyond Just Text Editing, Edition 8