I think this was also the first "Linux" I ever installed. On one of those Tanzania clone, Motorola StarMax 3000s. I seem to recall, that it never booted through OF, at that point. I can't remember which version that was, probably the early DR3.
I went through a few Linux distributions for it: MkLinux first, then LinuxPPC, and finally Yellow Dog Linux. The driver for the Ethernet card needed to be patched for big-endian machines and the kernel needed a patch to allow the ADB keyboard CapsLock to be remapped to Control. Fun times.
These PPC Macs are a bit overlooked, in my mind, but of course this is exactly the era that I really started to get into computers. Just seems like everyone else is either attracted to the compacts, or the colourful iMac era ones.