首先使用w命令查看所有在线用户：
[root@VM_152_184_centos /]# w 20:50:14 up 9 days, 5:58, 3 users, load average: 0.21, 0.05, 0.02USER TTY FROM LOGIN@ IDLE JCPU PCPU WHATroot pts/0 101.45.224.253 20:48 0.00s 0.00s 0.00s wroot pts/1 101.45.224.253 20:49 17.00s 0.00s 0.00s -bashhmj pts/2 101.45.224.253 20:50 2.00s 0.00s 0.00s -bash
执行命令：
pkill -kill -t TTY值
例：踢掉已登录用户hmj
pkill -kill -t pts/2
再用w命令查看是否已经强制踢掉：
[root@VM_152_184_centos /]# w 20:55:10 up 9 days, 6:03, 2 users, load average: 0.03, 0.03, 0.00USER TTY FROM LOGIN@ IDLE JCPU PCPU WHATroot pts/0 101.45.224.253 20:48 0.00s 0.00s 0.00s wroot pts/1 101.45.224.253 20:49 5:13 0.00s 0.00s -bash
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