UNIX Shells by Example, Third Edition is your complete, step-by-step guide to all five essential UNIX shells -- bash, tcsh, C, Bourne, and Korn -- and all three essential UNIX shell programming utilities, awk, sed and grep. This new Third Edition is better than ever, with hundreds of completely updated, classroom-proven examples from Silicon Valley's top UNIX and Linux instructor, Ellie Quigley. Starting with the basics, Quigley gets you all the way to expert-level techniques. Along the way, you'll learn what UNIX shells are, what they do, and how they integrate with other UNIX utilities and processes. You'll master creating, running, and debugging shell scripts; using grep, egrep and ggrep; working with sed, and much more. This edition contains extensive new coverage of bash and tcsh, as well as hundreds of updated and classroom-tested examples for all five leading shells. It contains hands-on exercises for every topic, an appendix with detailed syntax listings, comparison charts, and much more. For all UNIX system administrators, application developers, and power users.