问题：阿里云系统磁盘初始化之后，ssh连接服务器出错！
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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 ECDSA key sent by the remote host is
SHA256:xxxxxxxxxxxx
Please contact your system administrator.
Add correct host key in /Users/kylin/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/kylin/.ssh/known_hosts:1
ECDSA host key for XXXXXXXXXXX has changed and you have requested strict checking.
Host key verification failed.
解决：
使用命令清除所连接的IP
ssh-keygen -R XX.XX.XX.XX
eg.
ssh-keygen -R 172.168.3.44
