OS + Centos 7 user kick off

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12.当运行在多用户模式下时，用Ctrl+ALT+F*可以切换多少虚拟用户终端()
A.3 B.6 C.1 D.12
答案 Ctrl+Alt+F1、、、F6

linux下如何踢掉其他用户

https://www.cnblogs.com/fbwfbi/archive/2013/05/06/3063331.html

查看机器中登陆的用户

[root@chengest~]# w

16:29:02 up 2 days, 2:35, 5 users, load average: 0.03, 0.05, 0.01

USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT

root pts/1 :0.0 Tue15 2days 1:44 0.04s -bash

root pts/2 :0.0 Tue15 46:42m 0.05s 0.05s bash

root pts/3 :0.0 Tue15 2days 0.02s 0.02s bash

root pts/4 172.20.52.114 14:17 58:48 0.16s 0.03s sqlplus

root pts/5 172.20.52.114 15:31 0.00s 0.03s 0.00s w

我把pts/1踢掉（只有root才能去踢掉用户）

[root@chengest ~]# pkill -kill -t pts/1

[root@chengest ~]# pkill -kill -t pts/2

[root@chengest ~]# pkill -kill -t pts/3

查看是不是踢掉

[root@chengest ~]# w

16:34:16 up 2 days, 2:40, 2 users, load average: 0.00, 0.05, 0.02

USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT

root pts/4 172.20.52.114 14:17 1:04m 0.16s 0.03s sqlplus

root pts/5 172.20.52.114 15:31 0.00s 0.03s 0.00s w

root可以踢掉其他用户包括自己

案例2

[root@centos8 ~]# w
16:06:35 up 37 min, 6 users, load average: 0.00, 0.08, 0.07
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/0 10.48.69.80 15:34 2.00s 0.04s 0.00s w
test tty2 tty2 16:00 37:41 7.37s 0.01s /usr/libexec/gsd-disk-utility-notify
jbossuse tty3 - 16:01 5:12 0.02s 0.02s -bash
test tty4 - 16:02 3:54 0.02s 0.02s -bash
test tty5 - 16:02 3:46 0.02s 0.02s -bash
test tty6 - 16:02 3:30 0.02s 0.02s -bash

剔除桌面登陆用户

[root@centos8 ~]# pkill -kill -t tty2

[root@centos8 ~]# pkill -kill -t tty3

[root@centos8 ~]# pkill -kill -t tty4

[root@centos8 ~]# pkill -kill -t tty5

[root@centos8 ~]# pkill -kill -t tty6

查看剔除用户结果

[root@centos8 ~]# w

 16:15:19 up 46 min,  2 users,  load average: 0.23, 0.06, 0.04

USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT

root     pts/0    10.48.69.80      15:34    1.00s  0.04s  0.00s w

end

[root@centos8 ~]# pkill -kill -t tty3