Linux命令之shutdown

shutdown [選項] [時間] [通知消息](可以為空，但必須有參數和時間)

系統關機命令，所有登錄用戶都可看到關機信息。

(1).常用選項

-c 取消已經在進行的shutdown指令內容

-h 關機

-k 發送警告信息給所有登錄者

-r 重啟

(2).unbuntu獨有參數，CentOS沒有參數

-f 重啟后強制略過fsck磁盤檢測

-F 重啟后強制進行fsck磁盤檢測

(3).實例

特定時間執行關機命令

shutdown –h now             //立即關機
shutdown –h 12:00           //在12:00關機

指定五分鍾后關機，並發出警告信息

[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!                 //系統提醒
This System will be shutdown in 5 minutes                                            //用戶自定義提醒

指定3分鍾后重啟，並發出警告信息

[root@CentOS6 桌面]#shutdown –r +3 “3分鍾后關機重啟”
Broadcast message from root@CentOS6.8
                   (/dev/pts/0) at 13:53 …

The system is going down for reboot in 3 minutes!          //系統提醒
3分鍾后關機重啟                                              //用戶自定義提醒

給所有登錄用戶發送提醒

[root@CentOS6 桌面]#shutdown –k “Waring:maybe the system will be shutdown”
Shutdown:time expected
Try’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