Day 246/300 ssh连接提示“REMOTE HOST IDENTIFICATION HAS CHANGED! ”

（一）需求

我想连接远程服务器免密登录和命令行都报错ssh [email protected] - p但是有报错，如下：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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:vdHz3zOlFnQs/O+IkQCmN8FjCUSHJsKgVkD1+7KvmlA.
Please contact your system administrator.
Add correct host key in /Users/zhaoarden/.ssh/known_hosts to get rid of this message.
Offending ED25519 key in /Users/zhaoarden/.ssh/known_hosts:14
Host key for 47.93.247.224 has changed and you have requested strict checking.
Host key verification failed.

（二）分析

SSH会将访问过的公钥都缓存在(public key)；
下次访问时，SSH 会核对公钥，如果不对，会报错提示。
以免收到DNS的等攻击；

（三）解决方法

Mac版，找到known_hosts文件，/Users/zhaoarden/.ssh/known_hosts

删除对应IP对应的公钥就OK了。

再次连接可以了。

写在最后的话

学习路上，常常会懈怠《有想学技术需要监督的同学嘛~》

https://mp.weixin.qq.com/s/FyuddlwRY7DsHUejCjiVug

参考链接

https://cloud.tencent.com/developer/article/1508166