SSH 접속후 SSH 접속시 안될경우

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)