shutdown

shutdown

shutdown brings the system down securely:

• all current users are notified that the system will shut down
• login is blocked
• all processes are notified that the system will shut down with the signal SIGTERM

shutdown signals the init process to change the runlevel to either 0 for shutdown or 6 to reboot the system.

shutdown examples

shutdown in 5 minutes, with default warning message

shutdown 5

reboot in 5 minutes, with default warning message

shutdown -r 5

shutdown in 5 minutes and broadcast the supplied message to system users

shutdown 5 'system is going down'

shutdown at 23:15 (i.e. 11:15 pm)

shutdown -h 23:15

go to single user mode (i.e. run level 1) - this is a mode where only the admin (i.e. root) has access to the computer

shutdown now

-- RobertSajan - 03 Oct 2008