解决Ubuntu重装系统后，导致SSH认证失败的问题_ubuntu22 ssh 认证失败-优快云博客

本文链接：https://blog.youkuaiyun.com/chenzhengfeng/article/details/78294076

本文介绍了解决因Ubuntu服务器重装而导致的SSH认证失败问题的方法。通过清除特定文件内容，可以轻松解决Git命令执行时出现的警告及主机密钥验证失败等问题。

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由于存放Git代码库的Ubuntu服务器重新安装了系统，所以导致SSH认证失败。当在本地执行Git命令时，会提示如下的错误信息：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
a3:63:3a:0a:6a:18:fb:f6:f6:66:90:29:d0:22:e8:07.
Please contact your system administrator.
Add correct host key in /c/Documents and Settings/username/.ssh/known_hosts to get rid of this message.
Offending key in /c/Documents and Settings/username/.ssh/known_hosts:2
RSA host key for [100.130.100.99]:222 has changed and you have requested strict checking.
Host key verification failed.
fatal: The remote end hung up unexpectedly

其实解决方法很简单，就是将提示中C:/Documents and Settings/username/.ssh/known_hosts文件的内容清空，然后重新执行Git命令即可。
如果是在Ubuntu系统下，则应修改~/.ssh/known_hosts文件。