shutdown :
-r +num:num分之后重启(不加“+num”,默认1分钟)
shutdown -r now/hh:mm
shutdown -h +10 "System will be halt,please ready":提醒其他人
-c:取消关机
[root@localhost ~]# shutdown -r +10
Shutdown scheduled for Thu 2018-05-17 17:08:57 CST, use 'shutdown -c' to cancel.
[root@localhost ~]#
Broadcast message from root@localhost.localdomain (Thu 2018-05-17 16:58:57 CST):
The system is going down for reboot at Thu 2018-05-17 17:08:57 CST!
[root@localhost ~]# shutdown -c
Broadcast message from root@localhost.localdomain (Thu 2018-05-17 16:59:05 CST):
The system shutdown has been cancelled at Thu 2018-05-17 17:00:05 CST!