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