概要
sshで接続を試みて、WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!の警告が出て接続できないときの対処法
事象
$ ssh -i ~/.ssh/id_rsa user@example.com
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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:ThYwRCvgjDgQbLnt9dIYqv3KcjLQH95KA9zTnYj9ONU.
Please contact your system administrator.
Add correct host key in /Users/user/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/user/.ssh/known_hosts:55
ECDSA host key for example.com has changed and you have requested strict checking.
Host key verification failed.
対処法
~/.ssh/known_hosts
の該当ホスト※の行を削除する。
※上の例だと、example.com
$ sed '/example.com/d' /Users/user/.ssh/known_hosts > /Users/user/.ssh/known_hosts
以上で完了。
検証環境
- MacOS Sierra バージョン 10.12.6
- bash
- iTerm