Understanding sed, awk, and grep at the Command Line

Getting the most out of the command line means understanding the basic tools and knowing how to build on them. 

“Instead of giving you encyclopedic listings of every possible argument and use case for each of these ubiquitous commands,” writes Jim Salter, “we're going to teach you how to think about them—and how to easily, productively incorporate them in your own daily command-line use.”

This article provides simple examples for these three iconic tools: sed, awk, and grep.

Read more at Ars Technica.