SSH不能连接并提示REMOTE HOST IDENTIFICATION HAS CHANGED解决方法：

如果提示信息如下：

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@    WARNING: REMOTE HOST IDENTIFICATION HASCHANGED!     @

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IT IS POSSIBLETHAT SOMEONE IS DOING SOMETHING NASTY!

Someone couldbe eavesdropping on you right now (man-in-the-middle attack)!

It is alsopossible that the RSA host key has just been changed.

Thefingerprint for the RSA key sent by the remote host is

3c:3c:4b:f9:37:2f:76:61:15:65:e5:80:1b:db:a7:3c.

Please contactyour system administrator.

Add correcthost key in /root/.ssh/known_hosts to get rid of this message.

Offending keyin /root/.ssh/known_hosts:15

RSA host keyfor 192.168.0.252 has changed and you have requested strict checking.

Host keyverification failed.

rsync:connection unexpectedly closed (0 bytes received so far) [sender]

rsync error:error in rsync protocol data stream (code 12) at io.c(359)

的解决办法：

vi /root/.ssh/known_hosts

找到要连接的主机的ip，把它的那行所有信息删除（就是一行）