AT&T Unix Owner's Manual page 80

Shutting Down the System
Once the automatic shutdown procedure begins, a series
of messages appear. Your response is not reqUired
until the shutdown procedure is complete. Do not turn
off the power until you see the following message:
Ready to power off or reset the maChine.
Press RETURN to reboot
You can safely turn the power off now, or you can press
the Enter or Return key to continue using the
UNIX
PC.
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