github push 시 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!
Post

github push 시 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

04/04/2023
1

Problem

잘 사용 중이던 github가 어느날 git push 시 WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! 오류가 발생하였다.

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$ git push
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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:uNiVztksCsDhcc0u9e8................
Please contact your system administrator.
Add correct host key in /Users/niceharu/.ssh/known_hosts to get rid of this message.
Offending RSA key in /Users/niceharu/.ssh/known_hosts:2
Host key for github.com has changed and you have requested strict checking.
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Cause

SSH 접속 시 원격지의 식별정보가 바뀐 경우 나타나는 현상이다. 주로 목적지(github)의 IP는 동일한데, 목적지의 서버 장비나 환경이 바뀐 경우 나타난다.

Solution

계정 아래 .ssh/known_hosts 파일에 접속했던 사이트들의 ssh-rsa 키 값들이 저장되어 있는데 아래 명령어를 통해 해당 파일을 갱신해 준다.

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$ ssh-keygen -R github.com
git
github