[haoqimin@localhost root]$ shutdown --help
shutdown [OPTIONS...] [TIME] [WALL...]
Shut down the system.
--help Show this help
-H --halt Halt the machine
-P --poweroff Power-off the machine
-r --reboot Reboot the machine
-h Equivalent to --poweroff, overridden by --halt
-k Don't halt/power-off/reboot, just send warnings
--no-wall Don't send wall message before halt/power-off/reboot
-c Cancel a pending shutdown
-H 停止机器
-P 关闭电源
-r 重启
-h 相当于--poweroff和--halt
-k 模拟关机,向登录者发送关机警告
-c [说明信息] 取消关机
shutdown命令
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转载自liuna718-163-com.iteye.com/blog/2233011
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