Bambenek J., Klus A. grep Pocket Reference

Sebastopol: O’Reilly, 2009. — 78 p.Chances are that if you’ve worked for any length of time on a Linux system, either as a system administrator or as a developer, you’ve used the grep command. The tool is installed by default on almost every installation of Linux, BSD, and Unix, regardless of distribution, and is even available for Windows (with wingrep or via Cygwin).grep Pocket Reference.Conceptual Overview.
Introduction to Regular Expressions.
grep Basics.
Basic Regular Expressions (grep or grep -G).
Extended Regular Expressions (egrep or grep -E).
Fixed Strings (fgrep or grep -F).
Perl-Style Regular Expressions (grep -P).
Introduction to grep-Relevant Environment Variables.
Choosing Between grep Types and Performance Considerations.
Advanced Tips and Tricks with grep.