Anyone know sun sparcstation5

Hello folks

I’ve got my hands on a Sun Sparcstation5 and am being presented with a login screen. I know nothing about UNIX but am wanting to learn LINUX and was hoping to install this on the Sparc.

Can anyone tell me how I would go about reseting the machine or breaking into the login script so that I can let the CD drive I have run a bootable CD.

Please help it is a lovley bit of kit to sit there doing nothing.

COL