ssh 提示WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED

今天配置两台机器ssh通信认证，ssh ip date 出现问题如下问题：
[oneadmin@compute-56-12 ~]$ ssh 192.168.39.73 date
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
88:a5:9e:11:6b:cd:88:f3:6d:50:b6:b8:35:14:7d:8a.
Please contact your system administrator.
Add correct host key in /home/oneadmin/.ssh/known_hosts to get rid of this message.
Offending key in /home/oneadmin/.ssh/known_hosts:35
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Tue Aug  6 14:05:53 CST 2013

原因是密钥验证错误。
解决办法：
编辑该用户下家目录下的.ssh/known_hosts 删除包含该ip的一行的密钥，
$ vim .ssh/known_hosts
找到包含该ip的一行，在一般模式下，直接dd，然后在命令模式下：wq保存退出。
在此验证好了：
[oneadmin@compute-56-12 ~]$ ssh 192.168.39.73 date
Warning: Permanently added '192.168.39.73' (RSA) to the list of known hosts.
Tue Aug  6 14:08:51 CST 2013