You can soft or hard reboot a running instance.
A soft reboot attempts a graceful shut down and restart of the instance. A hard reboot power cycles the instance.
Soft reboot - ±âº» ¸®ºÎÆà / Á¤»óÁ¾·á
Hard reboot - °Á¦·Î Àü¿ø off / on
# nova reboot SERVER
# nova reboot --hard SERVER
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