需要解决这个问题，这是使用-v选项的输出：
emarguli@DESKTOP-6C25GHF:/$ ssh -v localhost
OpenSSH_7.2p2 Ubuntu-4ubuntu2.4, OpenSSL 1.0.2g 1 Mar 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/emarguli/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.4
debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.4 pat OpenSSH* compat 0x04000000
debug1: Authenticating to localhost:22 as 'emarguli'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:lUNGPHQv3Mh7sr4p6aIz/fW5r8uTRrJrBfHo9nk1gRk
debug1: Host 'localhost' is known and matches the ECDSA host key.
debug1: Found key in /home/emarguli/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/emarguli/.ssh/id_rsa
debug1: Trying private key: /home/emarguli/.ssh/id_dsa
debug1: Trying private key: /home/emarguli/.ssh/id_ecdsa
debug1: Trying private key: /home/emarguli/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).
答案1
线索就是倍数key_load_public: No such file or directory。您没有生成密钥，而服务器正在等待它们。
用于ssh-keygen创建您的密钥，然后重试。只需调用ssh-keygen，emarguli用户就会为您创建一个 RSA 密钥，这样您就可以继续操作了。
有关更多选项，请阅读手册页。
创建密钥后，您需要上传民众密钥到远程服务器，以便它信任您在客户端上拥有的私钥。通常，这可以使用以下命令来完成ssh-copy-id：
$ ssh-copy-id <user>@<server>
但当您连接到本地计算机时，您只需将 RSA 公钥附加~/.ssh/id_rsa.pub到您的授权密钥文件中即可~/.ssh/authorized_keys：
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
最后，确保最后一个文件的权限正确 - 它只能由其所有者写入：
chown 0640 ~/.ssh/authorized_keys