本文记录最近 github 推送或拉取代码时提示 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 而失败的解决方法。

报错提示如下：

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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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 RSA key sent by the remote host is
SHA256:uNiVztksCsDhcc0u9e8BujQXVUpKZIDTMczCvj3tD2s.
Please contact your system administrator.
Add correct host key in /c/Users/lindexi/.ssh/known_hosts to get rid of this message.
Offending RSA key in /c/Users/lindexi/.ssh/known_hosts:2
Host key for github.com has changed and you have requested strict checking.
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

最简单的方式就是删除上面提到的 known_hosts 文件，例如我的文件是 /c/Users/lindexi/.ssh/known_hosts 路径，直接使用 rm 命令删除，代码如下

rm /c/Users/lindexi/.ssh/known_hosts

还请在你电脑上执行以上命令的时候，替换为你自己的电脑上的路径。执行完成之后，重新推拉代码，可以看到以下提示信息，只需要输入 yes 回车即可。

The authenticity of host 'github.com (20.205.243.166)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])?

以上步骤就是在将 github 添加到 known_hosts 文件里。也就是下一次推拉代码就不需要再次执行以上步骤。
为什么有这样的事情呢？这是因为在 2023.03.24 更换了 GitHub 的 RSA 的 Key 值。因为 GitHub 团队发现自己的 Key 泄露了。详细请看 We updated our RSA SSH host key The GitHub Blog