SSH 접속 시 SHA 공유키 충돌 문제 발생 시

기존의 사용하던 서버 및 단말의 정보를 변경 후 아래와 같은 문제 발생 시

# pssh -h dept.hosts -i ls
[1] 14:06:49 [FAILURE] root@192.168.0.26 Exited with error code 255
Stderr: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    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
SHA256:qo/WOgVXbxSOZIivYXQJ4ZcxmZ88lqgRYwivbObzHYc.
Please contact your system administrator.
Add correct host key in /root/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /root/.ssh/known_hosts:4
ECDSA host key for 192.168.0.26 has changed and you have requested strict checking.
Host key verification failed.
 

다음의 명령어로 초기화

# ssh-keygen -R 192.168.0.26
# Host 192.168.0.26 found: line 3
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
 

확인

[3] 14:12:01 [SUCCESS] root@192.168.0.26
anaconda-ks.cfg
initial-setup-ks.cfg