ssh-keygen -R

생각없이 설치하다가 문득 떠오른 말이 있다.

제대로 해야지 남는다는..

지금부터라도 기록을 습관화 하자!

맥북에서 VBox에 VM을 생성하고 NAT외에 Host-bridge를 추가하여 네트워크를 2개를 설정하였다. 

$ ifconfig eth1 up 

터미널에서 ssh 접속해서 사용 중 이었는데, 새로운 VM을 만들고 접속하려니 요런 에러가 발생했다. 

정확한 이유는 잘 모르지만 업데이트가 필요한 듯?

adminui-MacBook-Pro:~ Jennie$ ssh user@192.168.56.101

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    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

Please contact your system administrator.

Add correct host key in /Users/admin/.ssh/known_hosts to get rid of this message.

Offending RSA key in /Users/admin/.ssh/known_hosts:1

RSA host key for 192.168.56.101 has changed and you have requested strict checking.

Host key verification failed. 

adminui-MacBook-Pro:~ Jennie$ ssh-keygen -R 192.168.56.101

# Host 192.168.56.101 found: line 1 type RSA

/Users/admin/.ssh/known_hosts updated.

Original contents retained as /Users/admin/.ssh/known_hosts.old

$ ssh-keygen ?

위의 명령어로 옵션을 확인하니 저 알려진 호스트관련 파일을 삭제하는 것 같다.

-R hostname Remove host from known_hosts file.

암튼 그 후에 다시 ssh 접속을 시도해보니 잘되었다.

adminui-MacBook-Pro:~ Jennie$ ssh user@192.168.56.101

The authenticity of host '192.168.56.101 (192.168.56.101)' can't be established.

RSA key fingerprint is e9:53:f7:f8:ac:32:89:73:11:b4:dd:fb:ec:76:5f:47.

Are you sure you want to continue connecting (yes/no)? yes

...

user@192.168.56.101's password: 

Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.19.0-25-generic x86_64)