解决Ubuntu重装系统后，导致SSH认证失败的问题

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。