SSH RSA host key for has changed and you have requeste

原文地址：http://www.cnblogs.com/dkblog/archive/2012/06/22/2558547.html

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @ 
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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 
3f:c4:56:c7:cc:ae:c7:a6:c1:f3:ce:12:22:f8:35:83. 
Please contact your system administrator. 
Add correct host key in /home/shetty/.ssh/known_hosts to get rid of this message. 
Offending key in /home/shetty/.ssh/known_hosts:11 
RSA host key for mysharebook.cn has changed and you have requested strict checking. 
Host key verification failed.

这是Linux重装或则openssh-server重装引起的，执行以下命令即可 
ssh-keygen -R 192.168.87.36

192.168.87.36换成你要连的服务器就可以了。