Compact little box, dual-booting MacOS 7.5.3 and Debian Sarge, with 36MB memory installed.
p460:/home/pvz# cat /proc/hardware Model: Macintosh Performa 460 CPU: 68030 MMU: 68030 FPU: none Clocking: 32.3MHz BogoMips: 8.08 Calibration: 4044800 loops System Memory: 36864K
uname -a Linux p460 2.2.25-mac #1 Wed Mar 10 00:26:32 CET 2004 m68k unknown
A test 2.6.12 kernel from http://people.debian.org/~cts/debian-m68k/linux-image/ boots with errors and leaves the keyboard unresponsive, but login through ssh works. uname -a Linux p460 2.6.12-1-mac #1 Sat Aug 13 23:52:22 CEST 2005 m68k GNU/Linux
Check this thread for more details:
http://lists.debian.org/debian-68k/2005/08/msg00004.html
http://www.everymac.com/systems/apple/mac_performa/stats/mac_performa_460.html