Every system administrator using Linux/Unix systems needs a working knowledge of shell scripting. But knowing just the how-to isnt always enough. Having readymade scripting recipes for various situations, environments, and challenges can make the job much easier.  Shell Scripting provides just that.  It covers shell programming, with a focus on Linux and the Bash shell, and provides a host of plug and play recipes for immediate use in addition to small variations that can make them useful in other environments. The recipes fit into parts including: Recipes for System Tools Recipes using Shell Features Recipes for Systems Administration   Topics include: Variables If/Then conditionals Loops (while, for, etc) Functions Pipes, Redirects, File I/O   The book uses realistic recipes to hold the pieces together, which provides credibility, real-world relevance, as well as providing the reader with flexible tools to get started immediately.