Bash Guide For Beginners

Bash Guide for Beginners

Version 1.8 Last updated 20060315 Edition

• Table of Contents
• Introduction
   
• 1. Why this guide?
• 2. Who should read this book?
• 3. New versions, translations and availability
• 4. Revision History
• 5. Contributions
• 6. Feedback
• 7. Copyright information
• 8. What do you need?
• 9. Conventions used in this document
• 10. Organization of this document


• 1. Bash and Bash scripts
   
• 1.1. Common shell programs
• 1.2. Advantages of the Bourne Again SHell
• 1.3. Executing commands
• 1.4. Building blocks
• 1.5. Developing good scripts
• 1.6. Summary
• 1.7. Exercises


• 2. Writing and debugging scripts
   
• 2.1. Creating and running a script
• 2.2. Script basics
• 2.3. Debugging Bash scripts
• 2.4. Summary
• 2.5. Exercises


• 3. The Bash environment
   
• 3.1. Shell initialization files
• 3.2. Variables
• 3.3. Quoting characters
• 3.4. Shell expansion
• 3.5. [li Summary
• 3.8. Exercises


• 4. Regular expressions
   
• 4.1. Regular expressions
• 4.2. Examples using grep
• 4.3. Pattern matching using Bash features
• 4.4. Summary
• 4.5. Exercises


• 5. The GNU sed stream editor
   
• 5.1. Introduction
• 5.2. Interactive editing
• 5.3. Non-interactive editing
• 5.4. Summary
• 5.5. Exercises


• 6. The GNU awk programming language
   
• 6.1. Getting started with gawk
• 6.2. The print program
• 6.3. Gawk variables
• 6.4. Summary
• 6.5. Exercises


• 7. Conditional statements
   
• 7.1. Introduction to if
• 7.2. More advanced if usage
• 7.3. Using case statements
• 7.4. Summary
• 7.5. Exercises


• 8. Writing interactive scripts
   
• 8.1. Displaying user messages
• 8.2. Catching user input
• 8.3. Summary
• 8.4. Exercises


• 9. Repetitive tasks
   
• 9.1. The for loop
• 9.2. The while loop
• 9.3. The until loop
• 9.4. I/0 redirection and loops
• 9.5. Break and continue
• 9.6. Making menus with the select built-in
• 9.7. The shift built-in
• 9.8. Summary
• 9.9. Exercises


• 10.nk url=/od/bgb_guide/a/gdebgb32.htm]Aliases[/link]
• 3.6. More Bash options
• 3.7. Summary
• 3.8. Exercises

4. Regular expressions

   

• 4.1. Regular expressions
• 4.2. Examples using grep
• 4.3. Pattern matching using Bash features
• 4.4. Summary
• 4.5. Exercises

5. The GNU sed stream editor

   

• 5.1. Introduction
• 5.2. Interactive editing
• 5.3. Non-interactive editing
• 5.4. Summary
• 5.5. Exercises

6. The GNU awk programming language

   

• 6.1. Getting started with gawk
• 6.2. The print program
• 6.3. Gawk variables
• 6.4. Summary
• 6.5. Exercises

7. Conditional statements

   

• 7.1. Introduction to if
• 7.2. More advanced if usage
• 7.3. Using case statements
• 7.4. Summary
• 7.5. Exercises

8. Writing interactive scripts

   

• 8.1. Displaying user messages
• 8.2. Catching user input
• 8.3. Summary
• 8.4. Exercises

9. Repetitive tasks

   

• 9.1. The for loop
• 9.2. The while loop
• 9.3. The until loop
• 9.4. I/0 redirection and loops
• 9.5. Break and continue
• 9.6. Making menus with the select built-in
• 9.7. The shift built-in
• 9.8. Summary
• 9.9. Exercises

10. More on variables

   

• 10.1. Types of variables
• 10.2. Array variables
• 10.3. Operations on variables
• 10.4. Summary
• 10.5. Exercises

11. Functions

   

• 11.1. Introduction
• 11.2. Examples of functions in scripts
• 11.3. Summary
• 11.4. Exercises

12. Catching signals

   

• 12.1. Signals
• 12.2. Traps
• 12.3. Summary
• 12.4. Exercises

A. Shell Features

   

• A.1. Common features
• A.2. Differing features

B. GNU Free Documentation License

   

• B.1. Preamble
• B.2. Applicability and definitions
• B.3. Verbatim copying
• B.4. Copying in quantity
• B.5. Modifications
• B.6. Combining documents
• B.7. Collections of documents
• B.8. Aggregation with independent works
• B.9. Translation
• B.10. Termination
• B.11. Future revisions of this license
• B.12. How to use this License for your documents

Glossary

Index

• List of Tables
• 1. Typographic and usage conventions
• 1-1. Overview of programming terms
• 2-1. Overview of set debugging options
• 3-1. Reserved Bourne shell variables
• 3-2. Reserved Bash variables
• 3-3. Special bash variables
• 3-4. Arithmetic operators
• 4-1. Regular expression operators
• 5-1. Sed editing commands
• 5-2. Sed options
• 6-1. Formatting characters for gawk
• 7-1. Primary expressions
• 7-2. Combining expressions
• 8-1. Escape sequences used by the echo command
• 8-2. Options to the read built-in
• 10-1. Options to the declare built-in
• 12-1. Control signals in Bash
• 12-2. Common kill signals
• A-1. Common Shell Features
• A-2. Differing Shell Features

• List of Figures
• 1. Bash Guide for Beginners front cover
• 2-1. script1.sh
• 3-1. Different prompts for different users
• 6-1. Fields in awk
• 7-1. Testing of a command line argument with if
• 7-2. Example using Boolean operators

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