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

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

vi Editor Pocket Reference

GDB Pocket Reference: Debugging Quickly & Painlessly with GDB

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

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

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

sed & awk: UNIX Power Tools, Edition 2

Learning the Korn Shell: Unix Programming, Edition 2

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

Linux in a Nutshell: A Desktop Quick Reference, Edition 6