Pro Bash Programming: Scripting the GNU/Linux Shell

This second edition has been updated for Bash 4.3, and many scripts have been rewritten to make them more idiomatically Bash, taking better advantage of features specific to Bash. Using this book you will be able to use the shell efficiently, make scripts run faster using expansion and external commands, and understand how to overcome many common mistakes that cause scripts to fail. Topics include: using the shell to write new utilities and accomplish most programming tasks; parameter expansion to replace external commands, making scripts very fast; avoid common mistakes that cause scripts to fail; Bash's readline and history libraries; new features; build shell scripts that get information from the web. --