GNU AWK
Example based guide to mastering GNU awk.
Exercises not yet included, but will be added soon...
See Version_changes.md to keep track of changes made to the book.
E-book
You can purchase the book using these links:
- https://gumroad.com/l/gnu_awk
- https://leanpub.com/gnu_awk
- You can also get the book as part of Magical one-liners bundle from https://gumroad.com/l/oneliners or https://leanpub.com/b/oneliners
- See https://learnbyexample.github.io/books/ for list of other books
For a preview of the book, see sample chapters
The book can also be viewed as a single markdown file in this repo. See my blogpost on generating pdf from markdown using pandoc if you are interested in the ebook creation process.
Feedback
Please open an issue if you spot any typo/errors.
I'd also highly appreciate your feedback about the book.
Goodreads: https://www.goodreads.com/book/show/52758608-gnu-awk
Twitter: https://twitter.com/learn_byexample
Table of Contents
- Preface
- Installation and Documentation
- awk introduction
- Regular Expressions
- Field separators
- Record separators
- In-place file editing
- Using shell variables
- Control Structures
- Built-in functions
- Multiple file input
- Processing multiple records
- Two file processing
- Dealing with duplicates
- awk scripts
- Gotchas and Tips
- Further Reading
Acknowledgements
- GNU awk documentation — manual and examples
- stackoverflow and unix.stackexchange — for getting answers to pertinent questions on
bash,awkand other commands - tex.stackexchange — for help on
pandocandtexrelated questions - Cover image: LibreOffice Draw
- softwareengineering.stackexchange and skolakoda for programming quotes
- Warning and Info icons by Amada44 under public domain
Special thanks to all my friends and online acquaintances for their help, support and encouragement, especially during these difficult times.
License
The book is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License
The code snippets are licensed under MIT, see LICENSE file