sed and awk Pocket Reference: Text Processing with Regular Expressions (Pocket Reference (O'Reilly))

grep Pocket Reference: A Quick Pocket Reference for a Utility Every Unix User Needs (Pocket Reference (O'Reilly))

Bash Pocket Reference: Help for Power Users and Sys Admins

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

sed & awk: UNIX Power Tools (Nutshell Handbooks)

Linux Pocket Guide: Essential Commands

Python Pocket Reference: Python In Your Pocket (Pocket Reference (O'Reilly))

Regular Expression Pocket Reference: Regular Expressions for Perl, Ruby, PHP, Python, C, Java and .NET (Pocket Reference (O'Reilly))

Definitive Guide to sed: Tutorial and Reference

Mastering Regular Expressions: Understand Your Data and Be More Productive