Linux on a SPARCserver 470?

Wolf asks: "I have just obtained a Sun SPARCserver 470 out of a government assets disposal sale. I need some hints (instructions) on how to install Linux on the beast. No root password, unfortunately. It has a CD-ROM and tape backup 2 serial ports and 3 ethernet ports, any info will be greatfully accepted. " Hmmm...government assets disposal sale? How come no one tells me of these things?