It's simple: if you want to interact deeply with Mac OS X， Linux， and other Unix-like systems， you need to know how to work with the Bash shell。 This concise little book puts all of the essential information about Bash right at your fingertips。

You'll quickly find answers to the annoying questions that generally come up when you're writing shell scripts: What characters do you need to quote？ How do you get variable substitution to do exactly what you want？ How do you use arrays？ Updated for Bash version 4。4， this book has the answers to these and other problems in a format that makes browsing quick and easy。

Topics include:


Invoking the shell
Syntax
Functions and variables
Arithmetic expressions
Command history
Programmable completion
Job control
Shell options
Command execution
Coprocesses
Restricted shells
Built-in commands