Tweet Automatic shutdown in Linux

You can tell your Linux box to shut down at a certain time of day using and customizing one of the commands below:
shutdown 8:00 -- Shutdown at 8:00

shutdown +13 -- Shutdown after 13 minutes
shutdown -r now -- Shutdown and restart
shutdown -k +2 -- Display the "The system is going DOWN to maintenance mode in 2 minutes!" message
shutdown -h now -- Shutdown and halt
shutdown -c -- Cancel ongoing shutdown command

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