Guide to Linux Advanced Bash Scripting Pro version

An in depth look at Bash Shell scripting.

Just Some of the Chapters!!!

Part 1. Introduction

1. Shell Programming!

2. Starting Off With a Sha-Bang

Part 2. Basics

3. Special Characters

4. Introduction to Variables and Parameters

5. Quoting

6. Exit and Exit Status

7. Tests

8. Operations and Related Topics

Part 3. Beyond the Basics

9. Another Look at Variables

10. Manipulating Variables

11. Loops and Branches

12. Command Substitution

13. Arithmetic Expansion

14. Recess Time

Part 4. Commands

15. Internal Commands and Builtins

16. External Filters, Programs and Commands

17. System and Administrative Commands

Part 5. Advanced Topics

18. Regular Expressions

19. Here Documents

20. I/O Redirection

21. Subshells

22. Restricted Shells

23. Process Substitution

24. Functions

25. Aliases

26. List Constructs

27. Arrays

28. Indirect References

29. /dev and /proc

30. Network Programming

31. Of Zeros and Nulls

32. Debugging

33. Options

34. Gotchas

35. Scripting With Style

36. Miscellany

37. Bash, versions 2, 3, and 4

38. Endnotes

38.1. Author's Note

38.2. About the Author

38.3. Where to Go For Help

38.4. Tools Used to Produce This Book

38.5. Credits

38.6. Disclaimer

Bibliography

A. Contributed Scripts

B. Reference Cards

C. A Sed and Awk Micro-Primer

C.1. Sed

C.2. Awk

D. Parsing and Managing Pathnames

E. Exit Codes With Special Meanings

F. A Detailed Introduction to I/O and I/O Redirection

G. Command-Line Options

G.1. Standard Command-Line Options

G.2. Bash Command-Line Options

H. Important Files

I. Important System Directories

J. An Introduction to Programmable Completion

K. Localization

L. History Commands

M. Sample .bashrc and .bash_profile Files

N. Converting DOS Batch Files to Shell Scripts

O. Exercises

O.1. Analyzing Scripts

O.2. Writing Scripts

P. Revision History

Q. Download and Mirror Sites

R. To Do List

S. Copyright

T. ASCII Table

Index

List of Tables

8-1. Operator Precedence

15-1. Job identifiers

33-1. Bash options

36-1. Numbers representing colors in Escape Sequences

B-1. Special Shell Variables

B-2. TEST Operators: Binary Comparison

B-3. TEST Operators: Files

B-4. Parameter Substitution and Expansion

B-5. String Operations

B-6. Miscellaneous Constructs

C-1. Basic sed operators

C-2. Examples of sed operators

E-1. Reserved Exit Codes

N-1. Batch file keywords / variables / operators, and their shell equivalents

N-2. DOS commands and their UNIX equivalents

P-1. Revision History

List of Examples

2-1. cleanup: A script to clean up log files in /var/log

2-2. cleanup: An improved clean-up script

2-3. cleanup: An enhanced and generalized version of above scripts.

3-1. Code blocks and I/O redirection

3-2. Saving the output of a code block to a file

3-3. Running a loop in the background

3-4. Backup of all files changed in last day

4-1. Variable assignment and substitution

4-2. Plain Variable Assignment

4-3. Variable Assignment, plain and fancy

4-4. Integer or string?

4-5. Positional Parameters

4-6. wh, whois domain name lookup

4-7. Using shift

5-1. Echoing Weird Variables

5-2. Escaped Characters

5-3. Detecting key-presses

6-1. exit / exit status

6-2. Negating a condition using !

7-1. What is truth?

7-2. Equivalence of test, /usr/bin/test, [ ], and /usr/bin/[

7-3. Arithmetic Tests using (( ))

7-4. Testing for broken links

7-5. Arithmetic and string comparisons

7-6. Testing whether a string is null

7-7. zmore

8-1. Greatest common divisor

8-2. Using Arithmetic Operations

8-3. Compound Condition Tests Using && and ||

8-4. Representation of numerical constants

8-5. C-style manipulation of variables

9-1. $IFS and whitespace

9-2. Timed Input

9-3. Once more, timed input

9-4. Timed read

9-5. Am I root?

9-6. arglist: Listing arguments with $* and $@

9-7. Inconsistent $* and $@ behavior

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