Advanced Topics

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Advanced Bash-Scripting Guide:
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Part 4. Advanced Topics
At this point, we are ready to delve into certain of the difficult and unusual aspects of scripting. Along the way, we will attempt to "push the envelope" in various ways and examine boundary conditions (what happens when we move into uncharted territory?).
Table of Contents
19. Regular Expressions
19.1. A Brief Introduction to Regular Expressions
19.2. Globbing
20. Subshells
21. Restricted Shells
22. Process Substitution
23. Functions
23.1. Complex Functions and Function Complexities
23.2. Local Variables
23.3. Recursion Without Local Variables
24. Aliases
25. List Constructs
26. Arrays
27. Files
28. /dev and /proc
28.1. /dev
28.2. /proc
29. Of Zeros and Nulls
30. Debugging
31. Options
32. Gotchas
33. Scripting With Style
33.1. Unofficial Shell Scripting Stylesheet
34. Miscellany
34.1. Interactive and non-interactive shells and scripts
34.2. Shell Wrappers
34.3. Tests and Comparisons: Alternatives
34.4. Recursion
34.5. "Colorizing" Scripts
34.6. Optimizations
34.7. Assorted Tips
34.8. Security Issues
34.9. Portability Issues
34.10. Shell Scripting Under Windows
35. Bash, version 2
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Recess Time Regular Expressions