## ssh 접속 시 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 문제
평소 ssh 로 잘 접속되었는데 갑자기 아래와 같은 메시지가 나오면서 접속되지 않는다면
```bash
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 ECDSA key sent by the remote host is
...
```
아래와 같이 명령어를 적고 다시 접속한다.
```bash
ssh-keygen -R IP 주소
```
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