The init command is an executable shell script that terminates all active processes on a system and then synchronizes the disks before changing run levels. Specifying run level 0 shuts down the OS and displays the OpenBoot prompt.
# init 0
# svc.startd: The system is coming down. Please wait.
svc.startd: 126 system services are now being stopped.
Sep 21 13:31:31 systemA.xxxxx.com syslogd: going down on signal 15
svc.startd: Killing user processes.
Sep 21 13:31:37 The system is down. Shutdown took 23 seconds.
syncing file systems... done
Program terminated
SUN BLADE 6000 MODULAR SYSTEM / SPARC T5-1B, No Keyboard
Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
OpenBoot 4.35. 63 GB memory available, Serial #xxxxxxxx.
Ethernet address 0:xx:xx:xx:xx:xx, Host ID: xxxxxxxx.
{0} ok