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the program is usually in /sbin
- for a shutdown but not necessarily powerdown
- /etc/halt -p
- for shutdown and power down
- Or use /sbin/shutdown
Usage: shutdown [-akrhPHfFnc] [-t sec] time [warning message] -a: use /etc/shutdown.allow -k: don't really shutdown, only warn. -r: reboot after shutdown. -h: halt after shutdown. -P: halt action is to turn off power. -H: halt action is to just halt. -f: do a 'fast' reboot (skip fsck). -F: Force fsck on reboot. -n: do not go through "init" but go down real fast. -c: cancel a running shutdown. -t secs: delay between warning and kill signal. ** the "time" argument is mandatory! (try "now") **