I posted to delicious.com

Command line made easy: five simple recipes for grep

http://arstechnica.com/open-source/news/2009/05/command-line-made-easy-five-simple-recipes-for-grep.ars

"The grep search utility is one of the most essential building blocks of command line text filtering and processing. In this tutorial, we will give you a few simple examples that will demonstrate how to get going with grep."