WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

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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
XXXXXXX
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending key in /root/.ssh/known_hosts:3
RSA host key for 192.168.0.1 has changed and you have requested strict checking.
Host key verification failed.

一般发生在服务器重装了或者秘钥更改后
原始的服务器A和B连接过,A服务器重装了或者秘钥更改后.B去连接A就会报错
需修改B的known_hosts文件

解决方案:
vi /root/.ssh/known_hosts
删除192.168.0.1所在的行,重新连接即可