我重新安装了我的服务器，我收到这些消息:

[user@hostname ~]$ ssh root@pong
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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 RSA key sent by the remote host is
6e:45:f9:a8:af:38:3d:a1:a5:c7:76:1d:02:f8:77:00.
Please contact your system administrator.
Add correct host key in /home/hostname /.ssh/known_hosts to get rid of this message.
Offending RSA key in /var/lib/sss/pubconf/known_hosts:4
RSA host key for pong has changed and you have requested strict checking.
Host key verification failed.

我尝试了在网上找到的各种解决方案。我的known_hosts文件(通常在~/.ssh/known_hosts中)在/var/lib/ss /pubconf/known_hosts中。我试图编辑它，但它仍然是一个状态。我已经安装了ipa-client和Fedora 19。如何解决此警告?

到目前为止回答的所有答案都只适用于没有安装Freeipa的情况。

下面adrin的评论中关于freeipa的正确答案在这里。