Linux中的关机和重启命令

一 shutdown命令

shutdown [选项] 时间

选项：

-c：取消前一次关机命令

-h：关机

-r：重启

 

二 shutdown实战

[root@localhost tmp]# date

Sat Jul 15 09:28:35 CST 2017

[root@localhost tmp]# shutdown -r 05:30

Shutdown scheduled for Sun 2017-07-16 05:30:00 CST, use 'shutdown -c' to cancel.

[root@localhost tmp]# shutdown -r 05:30 &

[1] 4936

[root@localhost tmp]# Shutdown scheduled for Sun 2017-07-16 05:30:00 CST, use 'shutdown -c' to cancel.

 

Broadcast message from [email protected] (Sat 2017-07-15 09:30:00 CST):

 

The system is going down for reboot at Sun 2017-07-16 05:30:00 CST!

 

^C

[1]+ Done shutdown -r 05:30

[root@localhost tmp]# shutdown -c

 

Broadcast message from [email protected] (Sat 2017-07-15 09:31:03 CST):

 

The system shutdown has been cancelled at Sat 2017-07-15 09:32:03 CST!

 

三 其他关机命令

halt

init 0

poweroff

 

四 其他重启命令

reboot

init 6

 

五 系统运行级别

 

 

六 查看系统运行级别以及修改系统的默认级别

runlevel

cat /etc/inittab

 

七 登出

logout

 

八 实战

[root@localhost tmp]#

[root@localhost tmp]# runlevel

N 5

[root@localhost tmp]# init 3

PolicyKit daemon disconnected from the bus.

We are no longer a registered authentication agent.

[root@localhost tmp]# runlevel

5 3

[root@localhost tmp]# logout