What this covers
The scope of this section, what it deliberately leaves out, and what "understanding Linux" means in practice.
The boundary
Two worlds separated by one hardware-enforced door, and why every mechanism in this section is shaped by that door.
What Linux is
Kernel, GNU, and distribution pulled apart, plus the two design commitments that still constrain everything: a stable user-space ABI and no stable module ABI.
Hardware assumed
The seven hardware capabilities every Linux mechanism rests on, each linked to the Computer Science page that owns it.
Distributions
Same kernel, different packaging: what genuinely varies between distributions and the much longer list of things that do not.
How to use this
Every convention this section uses, with a live example of each. The prose explaining the folder
Roadmap
Every page in this section declares its prerequisites in front matter, and the build fails on a
Glossary
Every term below links to the one page that owns and genuinely defines it, so "where did this come from" always has an answer. The list covers folders 00–10 so far and grows as later folders land — a term you expect but can't find here probably belongs to a page that hasn't been written yet.
Misconceptions
Every widely-held wrong belief this section corrects, gathered in one place and linked to the