Pro Bash Programming: Scripting the GNU/Linux Shell

Contents

About the Author

About the Technical Reviewer

Introduction

Chapter 1: Hello, World! Your First Shell Program

The Code

The File

The Naming of Scripts

Selecting a Directory for the Script

Creating the File and Running the Script

Choosing and Using a Text Editor

Building a Better "Hello, World!"

Summary

Commands

Concepts

Variables

Exercises

Chapter 2: Input, Output, and Throughput

Parameter and Variables

Positional Parameters

Special *@#0$?_!- Parameters

Variables

Arguments and Options

echo, and Why You Should Avoid It

printf: Formatting and Printing Data

Escape Sequences

Format Specifiers

Width Specification

Printing to a Variable

Line Continuation

Standard Input/Output Streams and Redirection

Redirection: >, >>, and <

Reading Input