Shutdown

Shutdown

sudo shutdown -h now

sudo halt

sudo init 0

sudo shutdown -r (time) (message)

Ex: sudo shutdown -r 18:45 "Server is going down for maintenance"

sudo shutdown -h 18:45 "Server is going down for maintenance"

sudo shutdown -h 0

sudo poweroff

Restart

sudo reboot

sudo shutdown -r now

sudo init 6

sudo shutdown -h (TIME) (MESSAGE)

Hibernate

sudo rtcwake -m [type of suspend] -s [number of seconds]

Ex: sudo rtcwake -m disk -s 60

The command suspends your system to disk (hibernates it) and wakes it up 60 seconds later.

Ex: sudo rtcwake -m no -l -t $(date +%s -d ‘tomorrow 06:30’)

Computer wake up at 6:30am tomorrow but not suspend immediately (assuming your hardware clock is set to local time).

MAN

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") **