旧服务器copy文件到新服务器，报错解决

问题详情：

gzucm04 20:28:52 ~
$ scp -r /home/gzucm04/project/ zhou1314@10.5.84.188:/home/zhou1314

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
SHA256:6+f0ZJMFMGmafdXesz/i7IQbW7edQ05Q7koXNsBnjQg.
Please contact your system administrator.
Add correct host key in /home/gzucm04/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /home/gzucm04/.ssh/known_hosts:2
  remove with:
  ssh-keygen -f "/home/gzucm04/.ssh/known_hosts" -R "10.5.84.188"
ECDSA host key for 10.5.84.188 has changed and you have requested strict checking.
Host key verification failed.
lost connection

原因：

因为服务器的ip发生变更了
第一次SSH连接时，会生成一个认证，储存在客户端（也就是用SSH连线其他电脑的那个，自己操作的那个）中的known_hosts，但是如果服务器验证过了，认证资讯当然也会更改，服务器端与客户端不同时，就会跳出错误啦。

解决办法：

方法一：
输入命令：ssh-keygen -R +输入服务器的IP
如：ssh-keygen -R 192.168.198.147

方法二：
rm ~/.ssh/known_hosts