Advanced Bash-Scripting Guide: A complete guide to shell scripting, using Bash
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Part 3. Beyond the Basics

Table of Contents

9. Variables Revisited

9.1. Internal Variables
9.2. Manipulating Strings
9.3. Parameter Substitution
9.4. Typing variables: declare or typeset
9.5. Indirect References to Variables
9.6. $RANDOM: generate random integer
9.7. The Double Parentheses Construct

10. Loops and Branches

10.1. Loops
10.2. Nested Loops
10.3. Loop Control
10.4. Testing and Branching

11. Internal Commands and Builtins

11.1. Job Control Commands

12. External Filters, Programs and Commands

12.1. Basic Commands
12.2. Complex Commands
12.3. Time / Date Commands
12.4. Text Processing Commands
12.5. File and Archiving Commands
12.6. Communications Commands
12.7. Terminal Control Commands
12.8. Math Commands
12.9. Miscellaneous Commands

13. System and Administrative Commands

14. Command Substitution

15. Arithmetic Expansion

16. I/O Redirection

16.1. Using exec
16.2. Redirecting Code Blocks
16.3. Applications

17. Here Documents

18. Recess Time

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Numerical Constants		Variables Revisited