Remote Host Identification has Changed

I just reinstalled our main server. When I try to ssh into it I got an error:

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@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
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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.

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.

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The reason behind this is because your local computer still has the old RSA host key stored in /home/your_account/.ssh/known_hosts.

The easiest way to solve this problem is simply delete that file or you can delete the host entry in the file.


Joseph