SSH로 서버에 접속 후,
서버에서 로컬의 다른 서버로  SSH 접속을 하는데 아래와 같은 경우를 만났다.

[userid@hostname ~]$ ssh localserver_ip
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00.
Please contact your system administrator.
Add correct host key in /home/userid/.ssh/known_hosts to get rid of this message.
Offending key in /home/userid/.ssh/known_hosts:1
RSA host key for 192.168.10.10 has changed and you have requested strict checking.
Host key verification failed.

해결방법은, 그냥 저 파일을 지우면 된다.
(아마.. 지금까지 접속했던 서버들에 대한 RSA 키도 전부 삭제 되므로, 다음번 접속시 전부 키를 받을 거냐고 물어볼 듯 하다)
Posted by 구차니