ssh远程出错
scp 远程复制文件出错

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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:FZD5y9aXKZMzz6cVeqGc5/5DdaKTetvWpZmClzyRDe4.
Please contact your system administrator.
Add correct host key in /home/xxx/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/xxx/.ssh/known_hosts:4
  remove with:
  ssh-keygen -f "/home/xxx/.ssh/known_hosts" -R "192.168.1.138"
ECDSA host key for 192.168.1.138 has changed and you have requested strict checking.
Host key verification failed.

解决办法

根据提示进入

/home/xxx/.ssh/known_hosts

把known_hosts重命名或者删除。