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Example based guide to mastering GNU sed

Home Page: https://learnbyexample.github.io/learn_gnused/

License: MIT License

Shell 99.31% sed 0.69%

ebook gnu sed regex command-line learn-by-doing exercises linux one-liners

learn_gnused's Introduction

Hello! 👋

I'm Sundeep Agarwal, author of several programming ebooks 📚 and devourer of fantasy books 🧙

I write about Regular Expressions, Linux CLI one-liners, Scripting Languages and Vim. I also maintain several curated resource lists.

👉 You can buy PDF/EPUB versions of my books via Gumroad or Leanpub.

📢 📢 Use this coupon link to get All books bundle with 25% discount.

✅ Follow me on twitter and Youtube for interesting tech nuggets.

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learn_gnused's Issues

Create guide for beginners

Many of us are here mostly because we chose Linux as a subject to learn in our college. And now it requires us to learn and get comfortable with sed but I find no guide on how to correctly utilise such repository.

Like how am I supposed to learn? Should I fork and make changes in the exercise section or copy input codes to feed my terminal and practise? but I would like to keep a track of my achievements and progress of learning sed.
This would be very helpful and appreciated.
Thank you.

Delete text between blank lines

sed can easily delete text between blank lines but gnused treats blank lines differently.

An example would be worthwhile. Two come to mind, replacing three blank lines with a single blank line and deleting a line and the following blank line (paragraph) if it contains a search string. Non-gnused:

sed 's/\n.*kill.*\n\n/\n/g' sample_text

sample_text

This is a
sample text

    kill = whatever

demonstration.

output

This is a
sample text

demonstration.

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