WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

$ ssh 192.168.0.2 -p 22

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    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 a host key has just been changed.

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

SHA256:hFbUChoKfS0VZsNAdfxuVs84xmrN39c1NJlFsFt8gCFVt8Y.

Please contact your system administrator.

Add correct host key in /Users/username/.ssh/known_hosts to get rid of this message.

Offending RSA key in /Users/username/.ssh/known_hosts:1

RSA host key for 192.168.0.2 has changed and you have requested strict checking.

Host key verification failed.

$ ssh-keygen -R 접속주소 또는 도메인

Are you sure you want to continue connecting (yes/no)? yes

또는

$ rm /Users/username/.ssh/known_hosts

서버에 새로운 OS를 설치했을 경우 발생하였다. 기존에 ssh를 통해 접속했다면 로컬측에 서버측 인증결과를 저장하는데 접속하려는 서버 정보가 달라졌을 경우에 발생되는 오류이다. 그냥 지워라~!!!