: shutdown - shuts down system in an orderly fashion
:	must be invoked by super-user: # nohup sh /etc/shutdown &

echo "Shutting down in 5 minutes." | /etc/wall
sleep 240
echo "Shutting down in 1 minute." | /etc/wall
sleep 60
echo "SYSTEM NOW SHUT DOWN." | /etc/wall
cp /etc/ttys.nodz /etc/ttys
kill -1 1
kill 5
kill 7
sync
echo "Shutdown complete." >/dev/tty8
