Debian 0.91
This is the oldest Debian release I can find. It’s not stored on http://archive.debian.org/ but on http://www.ibiblio.org/pub/historic-linux/distributions/debian-0.91/. It’s unclear why, I assume both are just people finding old disks with mirrors on.
Of all the installations this was the most tricky, much like Arch Linux the installer drops you at a shell prompt. The installer itself is a shell script. Once installed there is no dselect, just dpkg which is a shell script! The entire system and archive is relatively small, but you so end up with a working X environment, email and a compiler.
Screenshots
Installation notes
An exercise for the reader!