我有一台伺服器，透過 SSH 連接我的金鑰文件，例如id_rsa.pub.我在客戶端和伺服器端使用 Debian。
我按照教程禁用根身份驗證和密碼使用以提高安全性（透過/etc/ssh/sshd/sshd_config在伺服器上設定檔）。
到目前為止，我可以輕鬆地rsync將文件從我的電腦同步到伺服器。
幾天之前， 我使用了 cron 作業為此，我必須在伺服器端重置我的 root 密碼。
從那時起，我就不可能再rsync使用SSH;我收到以下訊息：
[email protected]: Permission denied (publickey).
rsync: connection unexpectedly closed (0 bytes received so far)[sender]
rsync error: unexplained error (code 255) at io.c(235)[sender=3.1.3]
有一些類似的主題，但我認為我的情況有點不同，因為我認為問題是由於在伺服器上重置密碼造成的。我還在 Ask Ubuntu 網站上提出了一個問題，但我認為也許這裡的人在權限問題上更專業。
我不知道如何解決這個問題（我在終端命令中進行了一些管理，但我不是電腦專家）。請問你能幫幫我嗎？
/etc/ssh/sshd_config僅供您參考，請參閱調整不使用密碼的教學：
#Uncomment or add the following line.
#This allows the server to give its DSA footprint in case of an ssh connection.
HostKey /etc/ssh/ssh/ssh_host_dsa_key
#Then set the next parameter to 20s (for example).
#This is the time during which a connection without being logged in will be opened.
#If we had kept the good old password technique, leave 2 or 3 minutes to type it, it's not too much.
#But since we're using the key now, we'll be logged in immediately. #So we can really reduce the thing and put it down to 20 seconds for example.
LoginGraceTime 20s
#this is the maximum number of attempts before being thrown by the server....
#Since with the key, no possible error, you can put it to 1 possible test.
MaxAuthTries 1
#Then, we will tell the SSH server where the keys are and tell it that we will use them as an authentication method
PubkeyAuthentication yes
AuthorizedKeysFile.ssh/authorized_keys
#And of course, we'll disable all other authentication methods
RSAAuthentication no.
UsePAM no
KerberosAuthentication no
GSSAPIA Authentication no.
PasswordAuthentication no
#Then, we will tell that we only allow users of the sshusers group (for more security)
AllowGroups sshusers
#The MaxStartups setting indicates the number of un-authenticated ssh connections you can launch at the same time.
#2 is more than enough, knowing that with the keys, it's instantaneous.
MaxStartups 2
答案1
我剛剛找到解決方案...我的命令是：
sudo rsync -avz -e "ssh -p <port>" <source> <destination>
但我必須簡單地做到這一點（沒有sudo）：
rsync -avz -e "ssh -p <port>" <source> <destination>
我不確定原因，但我認為root我的桌面電腦的用戶不允許透過 SSH 存取我的伺服器，因為金鑰僅適用於我的classic桌面用戶（因此沒有 sudo）。
有人可以確認一下嗎？謝謝。