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Preface 
1. bash Basics

      What Is a Shell? 

      Scope of This Book 

      History of UNIX Shells 

      Getting bash 

      Interactive Shell Use 

      Files 

      Input and Output 

      Background Jobs 

      Special Characters and Quoting 

      Help 
2. Command-Line Editing

      Enabling Command-Line Editing 

      The History List 

      emacs Editing Mode 

      vi Editing Mode 

      The fc Command 

      History Expansion 

      readline 

      Keyboard Habits 
3. Customizing Your Environment

      The .bash_profile, .bash_logout, and .bashrc Files 

      Aliases 

      Options 

      Shell Variables 

      Customization and Subprocesses 

      Customization Hints 
4. Basic Shell Programming

      Shell Scripts and Functions 

      Shell Variables 

      String Operators 

      Command Substitution 

      Advanced Examples: pushd and popd 
5. Flow Control

      if/else 

      for 

      case 

      select 

      while and until 
6. Command-Line Options and Typed Variables

      Command-Line Options 

      Typed Variables 

      Integer Variables and Arithmetic 

      Arrays 
7. Input/Output and Command-Line Processing

      I/O Redirectors 

      String I/O 

      Command-Line Processing 
8. Process Handling

      Process IDs and Job Numbers 

      Job Control 

      Signals 

      trap 

      Coroutines 

      Subshells 

      Process Substitution 
9. Debugging Shell Programs

      Basic Debugging Aids 

      A bash Debugger 
10. bash Administration

      Installing bash as the Standard Shell 

      Environment Customization 

      System Security Features 
11. Shell Scripting

      What's That Do? 

      Starting Up 

      Potential Problems 

      Don't Use bash 
12. bash for Your System

      Obtaining bash 

       Unpacking the Archive 

      What's in the Archive 

      Who Do I Turn to? 
A. Related Shells

      The Bourne Shell 

      The IEEE 1003.2 POSIX Shell Standard 

      The Korn Shell 

      pdksh 

      zsh 

      Shell Clones and Unix-like Platforms 
B. Reference Lists

      Invocation 

      Prompt String Customizations 

      Built-In Commands and Reserved Words 

      Built-In Shell Variables 

      Test Operators 

      set Options 

      shopt Options 

      I/O Redirection 

      emacs Mode Commands 

      vi Control Mode Commands 
C. Loadable Built-Ins
D. Programmable Completion
Index