[root@ok network-scripts]# ssh 192.168.1.10

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@    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

8b:e7:b8:6b:eb:a8:2d:06:7b:f1:75:c9:b5:48:a9:06.

Please contact your system administrator.

Add correct host key in /root/.ssh/known_hosts to get rid of this message.

Offending key in /root/.ssh/known_hosts:19

RSA host key for 192.168.1.10 has changed and you have requested strict checking.

Host key verification failed.

[root@ok network-scripts]# mv ~/.ssh/known_hosts ~/.ssh/known_hosts.bak

[root@ok network-scripts]# ssh 192.168.1.10

The authenticity of host '192.168.1.10 (192.168.1.10)' can't be established.

RSA key fingerprint is 8b:e7:b8:6b:eb:a8:2d:06:7b:f1:75:c9:b5:48:a9:06.

Are you sure you want to continue connecting (yes/no)?