OBP stands for open boot PROM. It will takes you to the “ok” prompt which is the firmware on sparc systems.
1. List all OBP variables, current and values.
printenv
2. Display hardware information and PROM version.
banner
3. Display the value of auto-boot.
printenv auto-boot?
4. Display the value of boot device.
printenv boot-device
5. Set the value of auto-boot.
setenv auto-boot? true
setenv auto-boot? false
set-default auto-boot?
6. List the actual device path for the disk device alias.
devalias disk
7. Display devices
show-devs
8. Synchronizes the file systems.
sync
9. Identify IDE devices.
probe-ide
10. Identify SCSI devices.
probe-scsi
11. Boot into single user mode from the CDROM.
boot cdrom -s
12. Boot in single user mode.
boot -s
13. Boot interactively.
boot -a
14. Start third party services.
boot -m milestone=all
15. Boot in verbose mode
boot -m verbose
16. Display help
help
17. Reset and clear system registers.
reset-all
