Host key verification failed

# 问题：
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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
SHA256:7rnV8KzcvQ5zmyhTQHsBgaS3i4qUAnHQw2qmV0B9PyU.
Please contact your system administrator.
Add correct host key in /Users/dongsheng/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/dongsheng/.ssh/known_hosts:39
ECDSA host key for 39.105.30.28 has changed and you have requested strict checking.
Host key verification failed.
lost connection

处理：
ssh-keygen -R '39.105.30.28'