ssh-keygen -f "/home/demo/.ssh/known_hosts" -R 远程IP
ECDSA host key for 远程 IP has changed and you have requested strict checking.
解决：
ssh-keygen -R 远程IP地址
ssh-keygen -f "/home/demo/.ssh/known_hosts" -R 远程IP
ECDSA host key for 远程 IP has changed and you have requested strict checking.
解决：
ssh-keygen -R 远程IP地址