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;
