查看機器中登陸的用戶
[root@sunsyk ~]# 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才能去踢掉用戶）
[root@sunsyk ~]# pkill -kill -t pts/1
[root@sunsyk ~]# pkill -kill -t pts/2
[root@sunsyk ~]# pkill -kill -t pts/3
查看是不是踢掉
[root@sunsyk ~]# 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可以踢掉其他用戶包括自己