# who
root       console      Jun 10 14:15 
# shutdown -g180 -y
 
Shutdown started.    Wed Jun 10 14:15:25 MDT 1998
 
Broadcast Message from root (console) on mars Wed Jun 10 14:15:26...
The system mars will be shut down in 3 minutes 
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Broadcast Message from root (console) on mars Wed Jun 10 14:17:58...
The system mars 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.
Print services stopped.
syslogd: going down on signal 15
Killing user processes: done.
 
INIT: SINGLE USER MODE
 
Type Ctrl-d to proceed with normal startup,
(or give root password for system maintenance): xxx
Entering System Maintenance Mode ...
#