I have ebooks on GNU sed and GNU awk with plenty of examples and exercises (free to read online): * https://learnbyexample.github.io/learn_gnused/ https://lear

I have ebooks on GNU sed and GNU awk with plenty of examples and exercises (free to read online): * https://learnbyexample.github.io/learn_gnused/ https://learnbyexample.github.io/learn_gnused/ * https://learnbyexample.github.io/learn_gnuawk/ https://learnbyexample.github.io/learn_gnuawk/ I also wrote TUI apps for interactive exercises (grep, sed, awk, etc): https://github.com/learnbyexample/TUI-apps https://github.com/learnbyexample/TUI-apps