,

ISBN:, Edition: ,

Price: -

Table of Contents

Chapter 1. Why Shell Programming? ~ 1

Chapter 2. Starting Off With a Sha-Bang ~ 3
2.1. Invoking the script ~ 5
2.2. Preliminary Exercises ~ 6
Part 2. Basics ~ 6

Chapter 3. Exit and Exit Status ~ 7

Chapter 4. Special Characters ~ 9

Chapter 5. Introduction to Variables and Parameters ~ 23
5.1. Variable Substitution ~ 23
5.2. Variable Assignment ~ 25
5.3. Bash Variables Are Untyped ~ 26
5.4. Special Variable Types ~ 27

Chapter 6. Quoting ~ 31

Chapter 7. Tests ~ 37
7.1. Test Constructs ~ 37
7.2. File test operators ~ 42
7.3. Comparison operators (binary) ~ 45
7.4. Nested if/then Condition Tests ~ 50
7.5. Testing Your Knowledge of Tests ~ 51

Chapter 8. Operations and Related Topics ~ 52
8.1. Operators ~ 52
8.2. Numerical Constants ~ 58
Part 3. Beyond the Basics ~ 58

Chapter 9. Variables Revisited ~ 60
9.1. Internal Variables ~ 60
9.2. Manipulating Strings ~ 75
9.3. Parameter Substitution ~ 79
9.4. Typing variables: declare or typeset ~ 87
9.5. Indirect References to Variables ~ 88
9.6. $RANDOM: generate random integer ~ 90
9.7. The Double Parentheses Construct ~ 94

Chapter 10. Loops and Branches ~ 96
10.1. Loops ~ 96
10.2. Nested Loops ~ 106
10.3. Loop Control ~ 106
10.4. Testing and Branching ~ 109

Chapter 11. Internal Commands and Builtins ~ 115
11.1. Job Control Commands ~ 130

Chapter 12. External Filters, Programs and Commands ~ 134
12.1. Basic Commands ~ 134
12.2. Complex Commands ~ 137
12.3. Time / Date Commands ~ 143
12.4. Text Processing Commands ~ 145
12.5. File and Archiving Commands ~ 162
12.6. Communications Commands ~ 170
12.7. Terminal Control Commands ~ 173
12.8. Math Commands ~ 174
12.9. Miscellaneous Commands ~ 177

Chapter 13. System and Administrative Commands ~ 184

Chapter 14. Command Substitution ~ 206

Chapter 15. Arithmetic Expansion ~ 209

Chapter 16. I/O Redirection ~ 210
16.1. Using exec ~ 212
16.2. Redirecting Code Blocks ~ 212
16.3. Applications ~ 216

Chapter 17. Here Documents ~ 218

Chapter 18. Recess Time ~ 223
Part 4. Advanced Topics ~ 223

Chapter 19. Regular Expressions ~ 225
19.1. A Brief Introduction to Regular Expressions ~ 225
19.2. Globbing ~ 227

Chapter 20. Subshells ~ 229

Chapter 21. Restricted Shells ~ 232

Chapter 22. Process Substitution ~ 234

Chapter 23. Functions ~ 236
23.1. Complex Functions and Function Complexities ~ 238
23.2. Local Variables and Recursion ~ 245

Chapter 24. Aliases ~ 247

Chapter 25. List Constructs ~ 250

Chapter 26. Arrays ~ 253

Chapter 27. Files ~ 264

Chapter 28. /dev and /proc ~ 265
28.1. /dev ~ 265
28.2. /proc ~ 265

Chapter 29. Of Zeros and Nulls ~ 270

Chapter 30. Debugging ~ 273

Chapter 31. Options ~ 279

Chapter 32. Gotchas ~ 282

Chapter 33. Scripting With Style ~ 286
33.1. Unofficial Shell Scripting Stylesheet ~ 286

Chapter 34. Miscellany ~ 289
34.1. Interactive and non-interactive shells and scripts ~ 289
34.2. Shell Wrappers ~ 290
34.3. Tests and Comparisons: Alternatives ~ 293
34.4. Optimizations ~ 294
34.5. Assorted Tips ~ 294
34.6. Oddities ~ 297
34.7. Portability Issues ~ 298

Chapter 35. Bash, version 2 ~ 299

Chapter 36. Endnotes ~ 303
36.1. Author's Note ~ 303
36.2. About the Author ~ 303
36.3. Tools Used to Produce This Book ~ 303
36.3.1. Hardware ~ 303
36.3.2. Software and Printware ~ 303
36.4. Credits ~ 304

Bibliography ~ 305

Appendix A. Contributed Scripts ~ 309

Appendix B. A Sed and Awk Micro-Primer ~ 327
B.1. Sed ~ 327
B.2. Awk ~ 329

Appendix C. Exit Codes With Special Meanings ~ 330

Appendix D. A Detailed Introduction to I/O and I/O Redirection ~ 332

Appendix E. Localization ~ 333

Appendix F. A Sample .bashrc File ~ 335

Advanced Bash-Scripting Guide