A while ago I started writing shell scripts again and it's fun. I wrote my own shell script to manage a todo list and I am reading an old book "The Unix Programming Environment" as well now.
It features some tools I have never even heard of, like od.
It's also interesting to read about the history of some tools like sed.
I never knew that grep and sed originally came from ed!
9 months ago
You should look into Multics (and CTSS) too. Multics gets ignored too often when most of Unix's features came from Multics and CTSS.
I wrote an article on Unix Shell History here, in case you are interested: gemini://auragem.letz.dev/~clseibold/20230924_ShellHistory_Unix.gmi · 9 months ago
gemini://auragem.letz.dev/~clseibold/20230924_ShellHistory_Unix.gmi