Debian Reference (2021)

There's an entire collection of documentation references which are packaged and installable under Debian's APT package manager:

<https://packages.debian.org/stable/doc/>

This includes Debian-specific guides (installation, administration, reference, and more, see: <https://www.debian.org/doc/>), as well as FAQs, HOWTOs, RFCs (divided amongst several packages based on relevance, status, and to minimise size), numerous extensive guides to other Debian packages and systems, and more.

Then there's DWWW, the Debian World Wide Web documentation interface:

<https://packages.debian.org/bullseye/dwww>

This provides localhost (or broader depending on how you configure your webserver) access to all Debian documentation, including not only the additional docs above, but the /usr/share/doc/ tree (which provides information on all installed packages), as well as manpages and info documents. You point your browser at https://localhost/dwww/ and are presented with both a tree and search across the collection.

It's a relatively simple concept, but one that's greatly assisted by the cohesion and coordination provided by the rest of the Debian system.

Oh, and the Debian Reference is also translated into French, German, Spanish, Italian, Japanese, Portuguese, and Chinese, and is available in HTML, plain text, and PDF formats.

English PDF for offline / e-book reading: <https://www.debian.org/doc/manuals/debian-reference/debian-r...>