RSA host key for mysharebook.cn has changed and you have requested strict checking. Host key verific

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 IP  
把IP换成你要连的服务器就可以了。