Linux shutdown Command

The Linux shutdown command is used to initiate a shutdown procedure and sends a message to all users' running processes before shutting down. It can also be used to reboot the system.

Usage Permission: System administrator.

Syntax

shutdown [-t seconds] [-rkhncfF] time [message]

Parameter Description:

-t seconds : Set the number of seconds after which the shutdown process will occur.
-k : Does not actually shut down, only sends a warning message to all users.
-r : Reboots after shutdown.
-h : Halts after shutdown.
-n : Does not use the normal shutdown procedure, forcibly kills all running processes and then shuts down.
-c : Cancels the currently ongoing shutdown action.
-f : Does not perform fsck (file system check) during shutdown.
-F : Forces fsck to be performed during shutdown.
time : Sets the time for shutdown.
message : The warning message to be sent to all users.

Examples

Immediate shutdown

# shutdown -h now

Shutdown in 10 minutes

# shutdown -h 10

Reboot the computer

# shutdown -r now

Linux Command Manual

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