查看系统在线用户
[root@apache ~]# w 
14:15:41 up 42 days, 56 min,  2 users,  load average: 0.07, 0.02, 0.00 
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT 
root     pts/0    116.204.64.165   14:15    0.00s  0.06s  0.04s w 
root     pts/1    116.204.64.165   14:15    2.00s  0.02s  0.02s –bash

查看当前自己占用终端，别把自己干掉了
[root@apache ~]# who am i 
root     pts/0        2013-01-16 14:15 (116.204.64.165)

用pkill 命令剔除对方
[root@apache ~]# pkill -kill -t pts/1

用w命令在看看干掉没
[root@apache ~]# w 
14:19:47 up 42 days,  1:00,  1 user,  load average: 0.00, 0.00, 0.00 
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT 
root     pts/0    116.204.64.165   14:15    0.00s  0.03s  0.00s w

如果最后查看还是没有干掉，建议加上-9 强制杀死。
[root@apache ~]# pkill -9 -t pts/1