如果你是Unix程序员，或者如果你在Windows上使用bash中，你会发现这个袖珍参考是必不可少的。
If you're a user or programmer of any Unix variant, or if you're using bash on Windows, you'll find this pocket reference indispensable. This book covers:
Invoking the Shell
Syntax
Functions
Variables
Arithmetic Expressions
Command History
Programmable Completion
Job Control
Shell Options
Command Execution
Coprocesses
Restricted Shells
Built-in Commands
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