Do you follow nostr:npub1gfstmjat7g9c65rvad3axg9lrsht99r2sw2ee3f92uxjvwr69vpqasmwqj ? They have a lot of good resources. Also there is an interesting website called Linux Handbook that is really useful. And then some book links below 👇

http://linux-training.be/?ref=linux-handbook