Problem using ssh to connect to remote computer

[tuathan]

being trying to connect to remote computer (has work fine before) but now i get this error:

$ ssh XXXXXXX@XXXXX.XXXXXXXXX.XX
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @@@@@@@@@
@ 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
b7:20:c5:5b:8f:d9:cd:89:48:ff:56:c7:40:c3:02:aa.
Please contact your system administrator.
Add correct host key in /home/xxxxxx/.ssh/known_hosts to get rid of this message.
Offending key in /home/xxxxxxx/.ssh/known_hosts:3
RSA host key for xxxxx.xxxxxxxxx.xx has changed and you have requested strict checking.
Host key verification failed.



How do add the new (changed) host key to /home/xxxxxx/.ssh/known_hosts?

please step me through the procedure....thanks

[smolloy]

If you're sure that the key has genuinely changed, and that there's not something nasty going on, then open the known_hosts file, and remove the line corresponding to the server you're trying to connect to.

But first, try to be sure that the key change is genuine, and not a man-in-the-middle attack.

[suabo8608]

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