O’Reilly Verlag

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Foreword 
Preface 
1. Background

       1.1 Unix History

       1.2 Software Tools Principles

       1.3 Summary
2. Getting Started

       2.1 Scripting Languages Versus Compiled Languages

       2.2 Why Use a Shell Script?

       2.3 A Simple Script

       2.4 Self-Contained Scripts: The #! First Line

       2.5 Basic Shell Constructs

       2.6 Accessing Shell Script Arguments

       2.7 Simple Execution Tracing

       2.8 Internationalization and Localization

       2.9 Summary
3. Searching and Substitutions

       3.1 Searching for Text

       3.2 Regular Expressions

       3.3 Working with Fields

       3.4 Summary
4. Text Processing Tools

       4.1 Sorting Text

       4.2 Removing Duplicates

       4.3 Reformatting Paragraphs

       4.4 Counting Lines, Words, and Characters

       4.5 Printing

       4.6 Extracting the First and Last Lines

       4.7 Summary
5. Pipelines Can Do Amazing Things

       5.1 Extracting Data from Structured Text Files

       5.2 Structured Data for the Web

       5.3 Cheating at Word Puzzles

       5.4 Word Lists

       5.5 Tag Lists

       5.6 Summary
6. Variables, Making Decisions, and Repeating Actions

       6.1 Variables and Arithmetic

       6.2 Exit Statuses

       6.3 The case Statement

       6.4 Looping

       6.5 Functions

       6.6 Summary
7. Input and Output, Files, and Command Evaluation

       7.1 Standard Input, Output, and Error

       7.2 Reading Lines with read

       7.3 More About Redirections

       7.4 The Full Story on printf

       7.5 Tilde Expansion and Wildcards

       7.6 Command Substitution

       7.7 Quoting

       7.8 Evaluation Order and eval

       7.9 Built-in Commands

       7.10 Summary
8. Production Scripts

       8.1 Path Searching

       8.2 Automating Software Builds

       8.3 Summary
9. Enough awk to Be Dangerous

       9.1 The awk Command Line

       9.2 The awk Programming Model

       9.3 Program Elements

       9.4 Records and Fields

       9.5 Patterns and Actions

       9.6 One-Line Programs in awk

       9.7 Statements

       9.8 User-Defined Functions

       9.9 String Functions

       9.10 Numeric Functions

       9.11 Summary
10. Working with Files

       10.1 Listing Files

       10.2 Updating Modification Times with touch

       10.3 Creating and Using Temporary Files

       10.4 Finding Files

       10.5 Running Commands: xargs

       10.6 Filesystem Space Information

       10.7 Comparing Files

       10.8 Summary
11. Extended Example: Merging User Databases

       11.1 The Problem

       11.2 The Password Files

       11.3 Merging Password Files

       11.4 Changing File Ownership

       11.5 Other Real-World Issues

       11.6 Summary
12. Spellchecking

       12.1 The spell Program

       12.2 The Original Unix Spellchecking Prototype

       12.3 Improving ispell and aspell

       12.4 A Spellchecker in awk

       12.5 Summary
13. Processes

       13.1 Process Creation

       13.2 Process Listing

       13.3 Process Control and Deletion

       13.4 Process System-Call Tracing

       13.5 Process Accounting

       13.6 Delayed Scheduling of Processes

       13.7 The /proc Filesystem

       13.8 Summary
14. Shell Portability Issues and Extensions

       14.1 Gotchas

       14.2 The bash shopt Command

       14.3 Common Extensions

       14.4 Download Information

       14.5 Other Extended Bourne-Style Shells

       14.6 Shell Versions

       14.7 Shell Initialization and Termination

       14.8 Summary
15. Secure Shell Scripts: Getting Started

       15.1 Tips for Secure Shell Scripts

       15.2 Restricted Shell

       15.3 Trojan Horses

       15.4 Setuid Shell Scripts: A Bad Idea

       15.5 ksh93 and Privileged Mode

       15.6 Summary
A. Writing Manual Pages
B. Files and Filesystems
C. Important Unix Commands
Bibliography 
Glossary 
Index