Foreword;
Preface;
Intended Audience;
What You Should Already Know;
Chapter Summary;
Conventions Used in This Book;
Code Examples;
Unix Tools for Windows Systems;
Safari Enabled;
We'd Like to Hear from You;
Acknowledgments;
Chapter 1: Background;
1.1 Unix History;
1.2 Software Tools Principles;
1.3 Summary;
Chapter 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;
Chapter 3: Searching and Substitutions;
3.1 Searching for Text;
3.2 Regular Expressions;
3.3 Working with Fields;
3.4 Summary;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 8: Production Scripts;
8.1 Path Searching;
8.2 Automating Software Builds;
8.3 Summary;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 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;
Chapter 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;
Appendix A: Writing Manual Pages;
A.1 Manual Pages for pathfind;
A.2 Manual-Page Syntax Checking;
A.3 Manual-Page Format Conversion;
A.4 Manual-Page Installation;
Appendix B: Files and Filesystems;
B.1 What Is a File?;
B.2 How Are Files Named?;
B.3 What's in a Unix File?;
B.4 The Unix Hierarchical Filesystem;
B.5 How Big Can Unix Files Be?;
B.6 Unix File Attributes;
B.7 Unix File Ownership and Privacy Issues;
B.8 Unix File Extension Conventions;
B.9 Summary;
Appendix C: Important Unix Commands;
C.1 Shells and Built-in Commands;
C.2 Text Manipulation;
C.3 Files;
C.4 Processes;
C.5 Miscellaneous Programs;
Chapter 16: Bibliography;
16.1 Unix Programmer's Manuals;
16.2 Programming with the Unix Mindset;
16.3 Awk and Shell;
16.4 Standards;
16.5 Security and Cryptography;
16.6 Unix Internals;
16.7 O'Reilly Books;
16.8 Miscellaneous Books;
Colophon;