SSHアクセスを取得できません：「権限が拒否されました（公開鍵）」

普通に使うテミウスMacからDebianサーバーにSSH経由で接続しましたが、これまではうまくいきました。今、私は好奇心が強いので、サードパーティが介入せずに内蔵のMac SSHクライアントを試してみました。

内容はこれです~/.ssh/config私のMacでは：

Host stalingrad
    Hostname xxx.xxx.xxx.xxx
    User root
    Port 22
    IdentityFile ~/.ssh/digital_ocean_id_rsa.pub
    IdentitiesOnly yes

私のMacを確認しました。~/.ssh/digital_ocean_id_rsa.pub私のDebianボックスと一致します。/root/.ssh/authorized_keys

また、VPS で次のコマンドを実行します。

$ chmod 700 /root/.ssh
$ chmod 600 /root/.ssh/authorized_keys 
$ /etc/init.d/ssh restart

さて、SSHを試してみましょう：

ssh [email protected]

私はこれを得た:

debug1: Will attempt key: /Users/andre/.ssh/id_rsa RSA SHA256:xxxxxxxxxxxxxxxx
debug1: Will attempt key: /Users/andre/.ssh/id_ecdsa 
debug1: Will attempt key: /Users/andre/.ssh/id_ecdsa_sk 
debug1: Will attempt key: /Users/andre/.ssh/id_ed25519 
debug1: Will attempt key: /Users/andre/.ssh/id_ed25519_sk 
debug1: Will attempt key: /Users/andre/.ssh/id_xmss 
debug1: Will attempt key: /Users/andre/.ssh/id_dsa 
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected]>
debug1: kex_input_ext_info: [email protected]=<0>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /Users/andre/.ssh/id_rsa RSA SHA256:xxxxxxxxxxxxxxxx
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/andre/.ssh/id_ecdsa
debug1: Trying private key: /Users/andre/.ssh/id_ecdsa_sk
debug1: Trying private key: /Users/andre/.ssh/id_ed25519
debug1: Trying private key: /Users/andre/.ssh/id_ed25519_sk
debug1: Trying private key: /Users/andre/.ssh/id_xmss
debug1: Trying private key: /Users/andre/.ssh/id_dsa
debug1: No more authentication methods to try.
[email protected]: Permission denied (publickey).

これが内容です/var/log/auth.logVPSから：

Oct 31 14:58:29 stalingrad sshd[249851]: error: kex_exchange_identification: Connection closed by remote host
Oct 31 14:58:29 stalingrad sshd[249851]: Connection closed by xxx.xxx.xxx.xxx port 52960
Oct 31 14:58:50 stalingrad sshd[253607]: Connection closed by authenticating user root yyy.yyy.yyy.yyy port 60773 [preauth]
Oct 31 14:58:59 stalingrad sshd[254173]: error: kex_exchange_identification: Connection closed by remote host
Oct 31 14:58:59 stalingrad sshd[254173]: Connection closed by xxx.xxx.xxx.xxx port 57792
Oct 31 14:59:27 stalingrad sshd[254174]: Received disconnect from yyy.yyy.yyy.yyy port 60774:11: Normal Shutdown [preauth]
Oct 31 14:59:27 stalingrad sshd[254174]: Disconnected from authenticating user root yyy.yyy.yyy.yyy port 60774 [preauth]
Oct 31 14:59:29 stalingrad sshd[254176]: error: kex_exchange_identification: Connection closed by remote host
Oct 31 14:59:29 stalingrad sshd[254176]: Connection closed by xxx.xxx.xxx.xxx port 34386
Oct 31 14:59:49 stalingrad sshd[254177]: Connection closed by authenticating user root yyy.yyy.yyy.yyy port 60777 [preauth]
Oct 31 14:59:59 stalingrad sshd[254180]: error: kex_exchange_identification: Connection closed by remote host
Oct 31 14:59:59 stalingrad sshd[254180]: Connection closed by xxx.xxx.xxx.xxx port 39216

SSHが指定された秘密鍵ファイルを読み取れなかったようです。number_ocean_id_rsa。代わりに、名前が「id_」で始まる秘密鍵ファイルの束を読み取ろうとします。どうなりますか？