Host key verification failed 대처

ssh 접속할 때 'Host key verification failed.' 메시지가 보인다면

고민할 것 없이 sudo ssh-keygen -R <IP>

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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 a host key has just been changed.

The fingerprint for the ECDSA key sent by the remote host is

SHA256:xXxxx6M48JB4exxxx+ZHjlY3Abo1tDaPhiSw3xxxxxY.

Please contact your system administrator.

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

Offending ECDSA key in /var/root/.ssh/known_hosts:40

ECDSA host key for 192.168.56.112 has changed and you have requested strict checking.

Host key verification failed.

sudo ssh-keygen -R 192.168.56.112