I've written books for GNU grep, sed, awk as well as one for coreutils. Free to read online. See https://github.com/learnbyexample/scripting_course#ebooks https

I've written books for GNU grep, sed, awk as well as one for coreutils. Free to read online. See https://github.com/learnbyexample/scripting_course#ebooks https://github.com/learnbyexample/scripting_course#ebooks for links. Have you looked at https://github.com/BurntSushi/xsv https://github.com/BurntSushi/xsv for csv processing?