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EC2にsshで接続するときに`Permission denied (publickey)`になって困ったら

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問題

ひさしぶりにEC2にsshで接続しようとすると、Permission denied (publickey)となって困る。

解決方法

EC2 インスタンスにアクセスしようとすると、「Permission denied (publickey)」または「Authentication failed, permission denied」というエラーが表示されます。これを解決するにはどうすればよいですか?を順に確認すればたいてい解決する。

今回は/home/ec2-user/.ssh/authorized_keysが無くなっていたので、手順に従って追加し、sshをやり直せば成功した。

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