Bill Phillips of Big Nerd Ranch presents a short intro to AWK:
If I’m hacking together something on the command line, chances are good that I’m using AWK for some part of it.
There are plenty of great resources on how to use AWK. Rather than write another one, this short post will show you the basics of what AWK is, and what it’s good for.
This is a good post to get the 30,000 foot view of AWK and its use on Mac OS X.