無法使用 scp 傳輸文件

我認為自己仍然是新手，所以我會盡力解釋我遇到的麻煩。我正在嘗試將文件發送scp到遠端伺服器，但我得到了Permission denied (publickey). 當我使用詳細 ( -v) 執行命令時，直到最後我都沒有發現任何錯誤。目標目錄是我用於 scp 的使用者的 rwx。幫助！

legoman@legoman-desktop:~$ sudo scp -v /home/legoman/Documents/index.html legoman@ip:/home/legoman/Documents
Executing: program /usr/bin/ssh host ip, user legoman, command scp -v -t /home/legoman/Documents
OpenSSH_8.3p1 Ubuntu-1ubuntu0.1, OpenSSL 1.1.1f  31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug1: Connecting to ip [ip] port 22.
debug1: Connection established.
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: identity file /root/.ssh/id_ecdsa_sk type -1
debug1: identity file /root/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: identity file /root/.ssh/id_ed25519_sk type -1
debug1: identity file /root/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /root/.ssh/id_xmss type -1
debug1: identity file /root/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.3p1 Ubuntu-1ubuntu0.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.1
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.1 pat OpenSSH* compat 0x04000000
debug1: Authenticating to ip:22 as 'legoman'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:bdj...
debug1: Host 'ip' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /root/.ssh/id_rsa 
debug1: Will attempt key: /root/.ssh/id_dsa 
debug1: Will attempt key: /root/.ssh/id_ecdsa 
debug1: Will attempt key: /root/.ssh/id_ecdsa_sk 
debug1: Will attempt key: /root/.ssh/id_ed25519 
debug1: Will attempt key: /root/.ssh/id_ed25519_sk 
debug1: Will attempt key: /root/.ssh/id_xmss 
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,sk-ssh-ed25519@openssh.com,ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,sk-ecdsa-sha2-nistp256@openssh.com>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa
debug1: Trying private key: /root/.ssh/id_dsa
debug1: Trying private key: /root/.ssh/id_ecdsa
debug1: Trying private key: /root/.ssh/id_ecdsa_sk
debug1: Trying private key: /root/.ssh/id_ed25519
debug1: Trying private key: /root/.ssh/id_ed25519_sk
debug1: Trying private key: /root/.ssh/id_xmss
debug1: No more authentication methods to try.
legoman@ip: Permission denied (publickey).
lost connection

還是有另一種不太安全的文件傳輸方式？這越來越乏味了。

您正在使用 執行該scp命令sudo，因此它的執行方式root與您的普通使用者不同。本地電腦上的 root 使用者有自己的 ssh 密鑰集，因此當您執行 時sudo scp...，該scp命令會在 root 的 ssh 密鑰中查找密鑰。但是，由於您嘗試以legoman.

所以，以使用者身份試試這個legoman：

scp -v /home/legoman/Documents/index.html legoman@ip:/home/legoman/Documents

如果這也失敗了，那麼您需要與遠端電腦的管理員交談，並要求他們設置您的使用者以便能夠連接到它。

通常，您幾乎不想以 root 身份執行scp，ssh除非只有目前機器的 root 使用者有權訪問遠端。

引用自：https://unix.stackexchange.com/questions/639126