help for power users and sys admins

bash pocket reference

If you want to get to the heart of Mac OS X,Linux, and other Unix systems,you need to know how to work with the bash shell.

如果你想深入了解Mac OS X,Linux或者其他Unix系统，你必须了解如何与bash打交道.

This concise little book puts all of the essential information about bash at your fingertips, and includes a comprehensive index.

这本简明小书使得bash的重要内容触手可及，并且还包含了一个全面的内容索引.

You‘ll quickly find answers to the annoying questions that always 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?And more.

每次你在写脚本时，遇到的诸如哪些字符需要引用？如何才能进行你想要的变量替换？如何使用数组等等烦人的问题，在本书中都可以迅速找到答案.

Updated for the most recent version of bash,this book covers:

本书已针对最新版本的bash更新,包括以下内容：

• Invoking the shell 调用shell
• Job control 作业控制
• Syntax 语法
• Shell options shell选项
• Functions 函数
• Command execution 命令执行
• Variables 变量
• Coprocesses 协程
• Arithmetic expressions 算术表达式
• Restricted shells 受限的shells
• Command history 命令历史
• Built-in commands 内置命令
• Programmable completion 可编程补全