Aquí dos métodos para eliminar una clave o fingerprint del known_hosts por línea de comandos:
[hvivani@test ~]$ ssh 10.0.1.145 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ 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 14:7e:6a:1f:c7:7b:ff:c1:df:4f:f7:d1:20:68:54:78. Please contact your system administrator. Add correct host key in /home/hvivani/.ssh/known_hosts to get rid of this message. Offending key in /home/hvivani/.ssh/known_hosts:39 RSA host key for 10.0.1.145 has changed and you have requested strict checking. Host key verification failed.
1) Con sed:
[hvivani@test .ssh]$ sed -i "39d" /home/hvivani/.ssh/known_hosts
2) Con ssh-key-gen
[hvivani@test .ssh]$ ssh-keygen -R 10.0.1.31
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