$ curl cheat.sh/
 cheat:shutdown 
# To reboot the system immediately:
shutdown -r now

# To shut system down immediately:
shutdown -h now

# To reboot system after 5 minutes:
shutdown -r +5

# To cancel a scheduled shutdown:
shutdown -c

 tldr:shutdown 
# shutdown
# Shutdown and reboot the system.
# More information: <https://manned.org/shutdown.8>.

# Power off (halt) immediately:
shutdown -h now

# Reboot immediately:
shutdown -r now

# Reboot in 5 minutes:
shutdown -r +5 &

# Shutdown at 1:00 pm (Uses 24h clock):
shutdown -h 13:00

# Cancel a pending shutdown/reboot operation:
shutdown -c

$
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