[userb]

Is there any tutorial like this for 'sed'?

[asicsp]

Check out https://unix.stackexchange.com/questions/112023/how-can-i-re...

For more detailed resources, see https://www.grymoire.com/Unix/Sed.html and my ebook https://learnbyexample.github.io/learn_gnused/

[fuzztester]

the original awk book is available somewhere on the net by googling. it is very good.