Unfortunately if you start at the Debian Web site http://www.debian.org/ports/powerpc/docu and selected either "Debian/PowerPC Installation-Tips" or "Debian/PowerPC Installations-Documentation" you get this encouraging response: "The requested URL /releases/potato/powerpc/install was not found on this server."
>we already installed Debian on a 7200 and wrote a Web page about it. Thank You Stephanie! It's so nice to know we don't have to re-invent the wheel. Would you mind posting the location of your working web page? thanks ---Layne ps I was referring to a stand alone set of Debian installation disks. Not load a macOS, boot a macOS, have a macApp steal OpenFirmware deficient info and then bounce into linux. I'm excitedly waiting to see if your webpage covers independent booting.
