完整报错信息：
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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 ED25519 key sent by the remote host is
SHA256:........
Please contact your system administrator.
Add correct host key in /Users/ningli/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/ningli/.ssh/known_hosts:4
Host key for x.x.x.x has changed and you have requested strict checking.
Host key verification failed.
解决办法：
参考：https://ithelp.ithome.com.tw/articles/10083004
Method 1
vim /root/.ssh/known_hosts
#把有問題的 ip KEY刪掉
Method 2
rm -rf /root/.ssh/known_hosts
# 谨慎操作
Method 3
ssh-keygen -R 2.1.2.5
# 移除有问题的即可，推荐～
