# who
root       console      Dec 13 14:30
# shutdown -g180 -y

Shutdown started.    Thu Dec 13 14:30:32 MST 2001

Broadcast Message from root (console) on earth Thu Dec 13 14:30:33...
The system earth will be shut down in 3 minutes 
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Broadcast Message from root (console) on earth Thu Dec 13 14:30:33...
The system earth will be shut down in 30 seconds
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INIT: New run level: S
The system is coming down for administration.  Please wait.
Unmounting remote filesystems: /vol nfs done.
Shutting down Solaris Management Console server on port 898.
Print services stopped.
Dec 13 14:34:00 earth syslogd: going down on signal 15
Killing user processes: done.

INIT: SINGLE USER MODE

Type control-d to proceed with normal startup,
(or give root password for system maintenance): xxx
Entering System Maintenance Mode ...
#