How to solve the problem of "offending key in ~ /. Ssh/known_hosts "File

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• Remove the offending SSH key

Remove the offending SSH key

Following error will be displayed when the remote host key changes (after you 've connected earlier with a valid remote host key ).

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@    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 isa7:a8:f2:97:94:33:58:b7:9d:bc:e0:a6:6b:f7:0a:29.Please contact your system administrator.Add correct host key in /home/ramesh/.ssh/known_hosts to get rid of this message.Offending key in /home/ramesh/.ssh/known_hosts: 6Permission denied (publickey,password).

You have to remove the key to proceed further. Use the following command to remove the offending key.

# sed -i '6d' ~/.ssh/known_hosts

Note: Change6dAccording to the line number shown.

If your sed does not have-I option, use Perl or use some editor to remove the offending key.

Perl solution:

# perl -pi -e 's/\Q$_// if ($. == 6);' ~/.ssh/known_hosts

Note: Change the line number from 6 to appropriate line number.