如果你在使用ssh连接你的服务器，出现了如下情况：
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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 a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
SHA256:7FeeOi0AWDrG83jPymg2XP+XRCLDZMqZNNBtPl62FoA.
Please contact your system administrator.
Add correct host key in /Users/lixh/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/lixh/.ssh/known_hosts:6
RSA host key for 192.168.0.107 has changed and you have requested strict checking.
Host key verification failed.
说明你曾经连接过这台服务器，只是IP一样服务器却是两台截然不同的机器。如果想让你的ssh能够连接，那我们就要删除本机的“known_hosts”文件，因为我的机器是苹果系统，所以路径是：“/Users/lixh/.ssh/known_hosts”（Linux操作系统路径为：“ /root/.ssh/known_hosts”），删除即可。
