Amazon.com description: Product Description: The shell is the main interactive scripting environment of every Unix and Linux system. The introduction of Apple's Mac OS X and the continued growth of the Linux installed base means that more users are finding that they have some type of Unix system available. Although Unix can be daunting, the fact that users can tweak their systems with a single line of shell script code makes Unix incredibly fun and powerful to use. Shell Script Pearls is a collection of useful scripts, techniques and examples that solve interesting problems and help Unix and Linux users become more proficient at shell programming. Each section contains a script or technique along with an explanation of how it works, and ideas for customization. Perfect for command line users who want to improve their scripting without trudging through exhaustive detail of a how-to book. Ron Peters has worked as a System Administrator at Intel for over 10 years, where he maintained large environments of Unix and Linux machines 24/7.