[dredmorbius]

One of the many joys of Debian (and derived GNU/Linux distros) is the dwww information server, which provides (local-only, by default) Web-based access to system information (man and info pages, package documentation, various documentation-oriented packages, etc.), and the doc-rfc-* packages, see:

<https://packages.debian.org/search?keywords=rfc>

And for dwww: <https://packages.debian.org/trixie/dwww>

These provide you with your own locally-browseable and searchable versions of RFCs. The packages are split so that you need not install all RFCs if you prefer not to, with informational, experimental, old, and proposed being notable collections.