@serge I had that book. Wait, I think I even wrote part of it?
/me checks...
Yup. The Emacs and Bash chapters 😂 . But I'm not sure if it's exactly the book you're thinking of?... https://osm.hpi.de/bs/2019/material/The_Linux_Users_Guide.pdf AHA, wait, maybe https://tldp.org/guides.html is the exact collection you remember.