This is various ways to shutdown your Linux computer. These methods will likely run on an Unix like Operating system

/sbin/shutdownEdit

This command is standard to any Unix like OS, including Linux. This command requires root access or sudo. See How to allow non-super users to shutdown computer in Linux

Its usage is:

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") **

If you just want it to turn off your computer right away, execute:

• /sbin/shutdown -hP now

DBUS & ConsoleKitEdit

The following requires DBUS and ConsoleKit to be installed and running, which is true on most systems.

• dbus-send --system --print-reply --dest="org.freedesktop.ConsoleKit" /org/freedesktop/ConsoleKit/Manager org.freedesktop.ConsoleKit.Manager.Stop

• The following is an old method that uses HAL and will not work on most systems because HAL has been deprecated.
  • dbus-send --print-reply --system --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/computer org.freedesktop.Hal.Device.SystemPowerManagement.Shutdown

acpidEdit

please add

XFCE4Edit

• xfce4-session-logout --halt

  this may not work if you don't have XFCE installed properly, I needed to configure XFCE with UDEV, DBUS, and ConsoleKit, and have them all running.

GnomeEdit

• gdm-control --shutdown

KDEEdit

please add

OtherEdit

Please add

ReferencesEdit

• DBUS & ConsoleKit: https://wiki.archlinux.org/index.php/Allow_Users_to_Shutdown
• Getting xfce4-session-logout to work right in Gentoo