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Advanced Bash-Scripting HOWTO: A guide to shell scripting, using Bash
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Chapter 3. Tutorial / Reference

 

...there are dark corners in the Bourne shell, and people use all of them.

 Chet Ramey
Table of Contents
3.1. exit and exit status
3.2. Special characters used in shell scripts
3.3. Introduction to Variables and Parameters
3.4. Quoting
3.5. Tests
3.5.1. File test operators
3.5.2. Comparison operators (binary)
3.6. Operations and Related Topics
3.6.1. Operations
3.6.2. Numerical Constants
3.7. Variables Revisited
3.7.1. Typing variables: declare or typeset
3.7.2. Indirect References to Variables
3.7.3. $RANDOM: generate random integer
3.8. Loops
3.9. Internal Commands and Builtins
3.10. External Filters, Programs and Commands
3.10.1. Basic Commands
3.10.2. Complex Commands
3.10.3. Time / Date Commands
3.10.4. Text Processing Commands
3.10.5. File and Archiving Commands
3.10.6. Communications Commands
3.10.7. Miscellaneous Commands
3.11. System and Administrative Commands
3.12. Backticks (`COMMAND`)
3.13. I/O Redirection
3.14. Recess Time
3.15. Regular Expressions
3.15.1. A Brief Introduction to Regular Expressions
3.15.2. Using REs in scripts
3.16. Subshells
3.17. Restricted Shells
3.18. Process Substitution
3.19. Functions
3.20. Aliases
3.21. List Constructs
3.22. Arrays
3.23. Files
3.24. Here Documents
3.25. Of Zeros and Nulls
3.26. Debugging
3.27. Options
3.28. Gotchas
3.29. Miscellany
3.29.1. Interactive and non-interactive scripts
3.29.2. Optimizations
3.29.3. Assorted Tips
3.30. Bash, version 2
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Shell wrapper, self-executing script exit and exit status

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