ssh The authenticity of host 192.168.0.xxx can't be established

用ssh登录一个机器（换过ip地址），提示输入yes后，屏幕不断出现y，只有按ctrl + c结束
 
错误是：The authenticity of host 192.168.0.xxx can't be established.
 
以前和同事碰到过这个问题，解决了，没有记录，这次又碰到了不知道怎么处理，还好有QQ聊天记录，查找到一下，找到解决方案：
 
执行ssh  -o StrictHostKeyChecking=no  192.168.0.xxx　就OK
 
网址是：
 
http://blog.ossxp.com/2010/04/1026/
 
记一下，防止又忘记了，又快到3点了，无数个不眠之夜啊。
 
 
2011/10/11
某天机器又改IP了，ssh后，报：
mmt@FS01:~$ ssh  -o StrictHostKeyChecking=no  192.168.0.130
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
fe:d6:f8:59:03:a5:de:e8:29:ef:3b:26:6e:3d:1d:4b.
Please contact your system administrator.
Add correct host key in /home/mmt/.ssh/known_hosts to get rid of this message.
Offending key in /home/mmt/.ssh/known_hosts:38
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
Permission denied (publickey,password).
 注意这句
Add correct host key in /home/mmt/.ssh/known_hosts to get rid of this message.
执行：
mv  /home/mmt/.ssh/known_hosts known_hosts.bak
再连：
ssh  -o StrictHostKeyChecking=no  192.168.0.130

OK了!