Linux的shutdown命令怎么使用

shutdown是最安全的关机和重启命令，平时使用时推荐使用shutdown命令关机和重启。

(1).常用选项

-c 取消已经在进行的shutdown指令内容

-h 关机

-k 发送警告信息给所有登录者

-r 重启

(2).unbuntu独有参数，CentOS没有参数

-f 重启后强制略过fsck磁盘检测

-F 重启后强制进行fsck磁盘检测

(3).实例

特定时间执行关机命令

shutdown –h now             //立即关机shutdown –h 12:00           //在12:00关机

指定五分钟后关机，并发出警告信息

[root@CentOS6 桌面]#shutdown +5 "This System will be shutdown in 5 minutes"Broadcast message from root@CentOS6.8                  (/dev/pts/0) at 13:33 …The system is going down for maintenance in 5 minutes!                 //系统提醒This System will be shutdown in 5 minutes                                            //用户自定义提醒

指定3分钟后重启，并发出警告信息

[root@CentOS6 桌面]#shutdown –r +3 "3分钟后关机重启"Broadcast message from root@CentOS6.8                  (/dev/pts/0) at 13:53 …The system is going down for reboot in 3 minutes!          //系统提醒3分钟后关机重启                                              //用户自定义提醒

给所有登录用户发送提醒

[root@CentOS6 桌面]#shutdown –k "Waring:maybe the system will be shutdown"Shutdown:time expectedTry’shutdown --help’ for more information.[root@CentOS6 桌面]# shutdown –k 5 "Waring:maybe the system will be shutdown"[root@CentOS6 桌面]#Broadcast message from root@CentOS6.8                  (/dev/pts/0) at 14:26 …The system is going down for maintenance in 5 minutes!Waring:maybe the system will be shutdown