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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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I wrote an ebook on GNU awk with hundreds of examples and exercises (programming.dev)

submitted 1 week ago by learnbyexample@programming.dev to c/linux@lemmy.ml

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Hello!

I am pleased to announce a new version of my CLI text processing with GNU awk ebook. This book will dive deep into field processing, show examples for filtering features, multiple file processing, how to construct solutions that depend on multiple records, how to compare records and fields between two or more files, how to identify duplicates while maintaining input order and so on. Regular expressions will also be discussed in detail.

Book links

To celebrate the new release, you can download the PDF/EPUB versions for free till 06-April-2025.

Or, you can read it online at https://learnbyexample.github.io/learn_gnuawk/

Interactive TUI apps

80+ exercises: https://github.com/learnbyexample/TUI-apps/blob/main/AwkExercises
Brief tutorial: https://github.com/learnbyexample/TUI-apps/blob/main/AwkTutorial

Feedback

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.

Happy learning :)

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[–] commander@lemmy.world 5 points 1 week ago (1 children)

I'm not expert in sed or awk. I always have to Google. For me though, it's generally that you can do a great deal in just one line of awk or sed. They're standard on any Linux distribution I've ever used. When building out pipelines, scripts that you want run from an installer you built post install and when removing, sed and awk rather than needing python.

All really nice when you have strict configuration management and versioning and there's something deployed but it doesn't have the python packages installed that would make it easy in python and you can't just pip install it on hundreds+ of computers without going through a process of approval and building a new tagged version release but sed/awk/etc can do the job. If it's hard enough, python and whatever packages you can install. If simple enough to do in a small bash script, no python just what's standard in your Linux distro

[–] N0x0n@lemmy.ml 1 points 1 week ago

I'm not expert in sed or awk. I always have to Google. For me though, it's generally that you can do a great deal in just one line of awk or sed.

Same here ! I recently used a one liner awk piped into sed, piped into another command to find duplicated lines and merge both files.

Writing a python script would have taken an unknown amount of time !