For system administrators, programmers, and end users, shell command or carefully crafted shell script can save you time and effort, or facilitate consistency and repeatability for a variety of common tasks. This cookbook provides more than 300 practical recipes for using bash, the popular Unix shell that enables you to harness and customize the power of any Unix or Linux system.Ideal for new and experienced users alike—including proficient Windows users and sysadmins—this updated second edition helps you solve a wide range of problems. You’ll learn ways to handle input/output, file manipulation, program execution, administrative tasks, and many other challenges. Each recipe includes one or more scripting examples and a discussion of why the solution works.Beginning bash -- Standard output -- Standard input -- Executing commands -- Basic scripting : shell variables -- Shell logic and arithmetic -- Intermediate shell tools I -- Intermediate shell tools II -- Finding files: find, locate, slocate -- Additional features for scripting -- Working with dates and times -- End-user tasks as shell scripts -- Parsing and simila tasks -- Writing secure shell scripts -- Advanced scripting -- Configuring and suctomizing bash -- Housekeeping and administrative tasks -- Working faster by typing less -- Tips and traps: common goofs for novices.