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Showing content from https://github.com/learnbyexample/learn_gnuawk below:

learnbyexample/learn_gnuawk: Example based guide to mastering GNU awk

Learn GNU awk with hundreds of examples and exercises. Visit https://youtu.be/KIa_EaYwGDI for a short video about the book.

The book also includes exercises to test your understanding, which are presented together as a single file in this repo — Exercises.md.

For solutions to the exercises, see Exercise_solutions.md.

You can also use this interactive TUI app to practice some of the exercises from the book.

See Version_changes.md to keep track of changes made to the book.

• You can purchase the pdf/epub versions of the book using these links:
  • https://learnbyexample.gumroad.com/l/gnu_awk
  • https://leanpub.com/gnu_awk
• You can also get the book as part of these bundles:
  • All books bundle bundle from https://leanpub.com/b/learnbyexample-all-books or https://learnbyexample.gumroad.com/l/all-books
  • Linux CLI Text Processing bundle from https://leanpub.com/b/linux-cli-text-processing or https://learnbyexample.gumroad.com/l/linux-cli-text-processing
  • Magical one-liners bundle from https://leanpub.com/b/oneliners or https://learnbyexample.gumroad.com/l/oneliners
  • Awesome Regex bundle from https://leanpub.com/b/regex or https://learnbyexample.gumroad.com/l/regex
• See https://learnbyexample.github.io/books/ for a 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/epub from markdown using pandoc if you are interested in the ebook creation process.

For the web version of the book, visit https://learnbyexample.github.io/learn_gnuawk/

Step up your cli fu with this fabulous intro & deep dive into awk. I learned a ton of tricks!

— feedback on twitter

I consider myself pretty experienced at shell-fu and capable of doing most things I set out to achieve in either bash scripts or fearless one-liners. However, my awk is rudimentary at best, I think mostly because it's such an unforgiving environment to experiment in.

These books you've written are great for a bit of first principles insight and then quickly building up to functional usage. I will have no hesitation in referring colleagues to them!

— feedback on Hacker News

⚠️ ⚠️ Please DO NOT submit pull requests. Main reason being any modification requires changes in multiple places.

I would highly appreciate it if you'd let me know how you felt about this book. It could be anything from a simple thank you, pointing out a typo, mistakes in code snippets, which aspects of the book worked for you (or didn't!) and so on. Reader feedback is essential and especially so for self-published authors.

You can reach me via:

• Issue Manager: https://github.com/learnbyexample/learn_gnuawk/issues
• E-mail: echo 'bGVhcm5ieWV4YW1wbGUubmV0QGdtYWlsLmNvbQo=' | base64 --decode
• Twitter: https://twitter.com/learn_byexample

1. Preface
2. Installation and Documentation
3. awk introduction
4. Regular Expressions
5. Field separators
6. Record separators
7. In-place file editing
8. Using shell variables
9. Control Structures
10. Built-in functions
11. Multiple file input
12. Processing multiple records
13. Two file processing
14. Dealing with duplicates
15. awk scripts
16. Gotchas and Tips
17. Further Reading

• GNU awk documentation — manual and examples
• stackoverflow and unix.stackexchange — for getting answers to pertinent questions on awk and related commands
• tex.stackexchange — for help on pandoc and tex related questions
• /r/commandline/, /r/linux4noobs/, /r/linuxquestions/ and /r/linux/ — helpful forums
• canva — cover image
• oxipng, pngquant and svgcleaner — optimizing images
• Warning and Info icons by Amada44 under public domain
• arifmahmudrana for spotting an ambiguous explanation
• Pound-Hash for critical feedback
• FabijanC and alexwheezy for spotting ambiguous descriptions, typos and issues with commands
• mdBook — for web version of the book
  • mdBook-pagetoc — for adding table of contents for each chapter
  • minify-html — for minifying html files

Special thanks to all my friends and online acquaintances for their help, support and encouragement, especially during difficult times.

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.

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