The bash shell is a complete programming language, not merely a glue to combine external Linux commands. By taking full advantage of shell internals, shell programs can perform as snappily as utilities written in C or other compiled languages. And you will see how, without assuming Unix lore, you can write professional bash 4.0 programs through standard programming techniques.
- Complete bash coverage
- Teaches bash as a programming language
- Helps you master bash 4.0 features
What you???ll learn
- Use the shell to write new utilities and accomplish most programming tasks.
- Use shell parameter expansion to replace many external commands, making scripts very fast.
- Learn to avoid many common mistakes that cause scripts to fail.
- Learn how bash???s readline and history libraries can save typing when getting user input.
- Learn to use features new to bash 4.0.
- Build shell scripts that get information from the Web.
Who this book is for
Beginning Linux and Unix system administrators who want to be in full command of their systems.
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Table of Contents
- Hello, World! Your First Shell Program
- Input, Output, and Throughput
- Looping and Branching
- Command-Line Parsing and Expansion
- Parameters and Variables
- Shell Functions
- String Manipulation
- File Operations and Commands
- Reserved Words and Builtin Commands
- Writing Bug-Free Scripts and Debugging the Rest
- Programming for the Command Line
- Runtime Configuration
- Data Processing
- Scripting the Screen
- Entry-Level Programming
