Solaris: Useful ok prompt (OBP) commands

The boot process can be aborted, if you are at the terminal, the abort sequences are Stop-A, L1-A or Break (depending on keyboard type), which can be emulated over remote consoles (rsc, alom, ilom, xscf)
Entering the following commands would obviously have consequences, and they are:
boot - boots to multi user mode
boot cdrom - boots from cdrom
boot -r - reconfiguration boot
boot -a - interactive reboot
boot -s - single user mode