In the following example, the init command is used to bring an IA based standalone system to the level where it is safe to turn off power.
# init 0 # INIT: New run level: 0 The system is coming down. Please wait. . . . The system is down. syncing file systems...    done Type any key to continue
See "How to Turn Off Power to All Devices" if you are bringing the system to run level 0 to turn off power to all devices.