I appreciate the Arch wiki much, even as a layman Kubuntu user. It explains some background concepts pretty well which aren’t typically coveyed in man pages which dedicate themselves to individual commands and their syntax. For instance I’ve read about home folder encryption or how signals get converted from keyboard presses to symbols on screen. It’s not perfect when it comes to writing style and coverage sure, but it’s a valuable compendium to have in addition to everything else.