Amazon.com description: Product Description: The quick, friendly, hands-on tutorial on UNIX programming with awk, sed and grep -- -- with exclusive access to an up-to-the-minute Web-based training site! Learn step-by-step how to solve practical problems with awk, sed and grep. Begin with a hands-on introduction to regular expressions and grep. Through interactive Labs, learn the fundamentals of sed, including addressing, commands, scripting and more. Walk step-by-step through the Awk language, writing simple programs, understanding data types, statements, expressions, patterns, actions, functions, arrays and I/O. Finally, put it all together with the Awk utility, learning techniques for printing, computation, and text processing. The accompanying Web site includes a Virtual Study Lounge where you can meet authors and other users; interactive testing modules that offer instant feedback; bonus projects and solutions; updates, new info, feedback areas and more.