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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. /dev and /proc
27.1. /dev
27.2. /proc
28. Of Zeros and Nulls
29. Debugging
30. Options
31. Gotchas
32. Scripting With Style
32.1. Unofficial Shell Scripting Stylesheet
33. Miscellany
33.1. Interactive and non-interactive shells and scripts
33.2. Shell Wrappers
33.3. Tests and Comparisons: Alternatives
33.4. Recursion
33.5. "Colorizing" Scripts
33.6. Optimizations
33.7. Assorted Tips
33.8. Security Issues
33.9. Portability Issues
33.10. Shell Scripting Under Windows
34. Bash, versions 2 and 3
34.1. Bash, version2
34.2. Bash, version 3
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Recess Time Regular Expressions
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