Maybe you don’t care about the forth programming language, but if you work on Sparc systems long enough you are going to have to work from the ok prompt.
Here are the essentials commands you must know.
Boot the system normally
ok> boot
Boot the system and allow for discovery of new devices (reconfiguration boot)
ok> boot -r
Boot into Single-User Mode
ok> boot -s
Boot into a ROM, useful if your system isn’t bootable
