Xmodulo shows you how to use the awk command in Linux

Text processing is at the heart of Unix. From pipes to the /proc subsystem, the "everything is a file" philosophy pervades the operating system and all of the tools built for it. Because of this, getting comfortable with text-processing is one of the most important skills for an aspiring Linux system administrator, or even any power user, and awk is one of the most powerful text-processing tools available outside general-purpose programming languages.

The simplest awk task is selecting fields from stdin; if you never learn any more about awk than this, you'll still have at your disposal an extremely useful tool.

  How to use awk command in Linux