ssh 远程错误： WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

报错原因：

本机与远程主机ip之前配对过密钥

LdeMacBook-Pro:~ $ ssh root@10.211.55.5
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 ECDSA key sent by the remote host is
SHA256:zOa3QhCzCn3jYjbdgSfWiDofQFomE3B4bvkMbOQxl88.
Please contact your system administrator.
Add correct host key in /Users/lu/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/lu/.ssh/known_hosts:10
ECDSA host key for 10.211.55.5 has changed and you have requested strict checking.
Host key verification failed.

解决方法：

vi ~/.ssh/known_hosts

删除对应密钥文件即可

LdeMacBook-Pro:~ $ ssh root@10.211.55.5
The authenticity of host '10.211.55.5 (10.211.55.5)' can't be established.
ECDSA key fingerprint is SHA256:zOa3QhCzCn3jYjbdgSfWiDofQFomE3B4bvkMbOQxl88.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.211.55.5' (ECDSA) to the list of known hosts.
root@10.211.55.5's password:
Last login: Thu Mar 12 11:10:59 2020