Linux强制用户下线

强制用户下线，首先得有root的权限

查询在登陆的信息

[root@rc01 etc]# w
 22:49:02 up  14:38,  3 users,  load average: 0.01, 0.02, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     tty1     -                21:10    1:28m  0.07s  0.07s -bash
root     pts/0    192.168.204.1    20:27    1.00s  0.20s  0.05s w
advisen  pts/1    192.168.204.1    21:44    2:58   0.02s  0.11s sshd: advisen [
[root@rc0 etc]#
[root@rc0 etc]# who
root     tty1         2017-02-25 21:10
root     pts/0        2017-02-25 20:27 (192.168.204.1)
advisen  pts/1        2017-02-25 21:44 (192.168.204.1)

使用命令查杀

pkill -kill -t TTY值

[root@rc01 etc]# pkill -kill -t pts/1
[root@rc01 etc]# w
 22:51:32 up  1:40,  2 users,  load average: 0.00, 0.01, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     tty1     -                20:10    1:30m  0.07s  0.07s -bash
root     pts/0    192.168.204.1    20:27    0.00s  0.15s  0.00s w

补充

pgrep, pkill :通过过滤显示和杀死进程的

        pgrep [options] pattern

        pkill [options] pattern

        -u uid: effective user 有效用户ID

                -U uid: real user 实际用户ID

                -t terminal: 与指定终端相关的进程

                -l: 显示进程名

                -a: 显示完整格式的进程名

                -P pid: 显示其父进程为此处指定的进程的进程列表