"Warning: Remote Host Identification Has Changed"

问题表述，使用“scp”命令时，出现如下错误提示：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING
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
5c:9b:16:56:a6:cd:11:10:3a:cd:1b:a2:91:cd:e5:1c.
Please contact your system administrator.
Add correct host key in /home/user/.ssh/known_hosts to get rid of this message.
Offending key in /home/user/.ssh/known_hosts:1
RSA host key for ras.mydomain.com has changed and you have requested strict checking.
Host key verification failed.

解决：强制删除"/etc/.ssh/known_hosts"中的主机名。

$ ssh-keygen -R {server.name.com}
$ ssh-keygen -R {ssh.server.ip.address}
$ ssh-keygen -R server.example.com

其输出结果为：

/home/vivek/.ssh/known_hosts updated.
Original contents retained as /home/vivek/.ssh/known_hosts.old