用户的 SSH 密钥授权答案

【问题标题】：SSH Key authorization for user用户的 SSH 密钥授权
【发布时间】：2017-11-06 06:26:07
【问题描述】：

场景：有多个用户需要通过 SSH 连接到服务器。我关注的是

在 AWS EC2 中运行的服务器（Ubuntu 14.04 Server）中创建 user1、user2。
将每个用户公钥（id_rsa.pub）添加到服务器/home/$USER/.ssh/authorized_keys文件中

问题是我只能使用用户的私钥通过 SSH 连接到ubuntu（默认用户）。但我无法通过 SSH 连接到 user1 用户。

样本

[root@rubi-pc Downloads]# ssh -i ~/.ssh/id_rsa ruwan@DummyIP -v
OpenSSH_7.5p1, OpenSSL 1.1.0e  16 Feb 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to DummyIP [DummyIP] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.5
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8 pat OpenSSH_6.6.1* compat 0x04000000
debug1: Authenticating to DummyIP:22 as 'ruwan'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
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 SHA256:0kqNAt37ILO4cCP8ioiLN9j9x9badLOGL+etIvSYzfs
debug1: Host 'DummyIP' is known and matches the ECDSA host key.
debug1: Found key in /root/.ssh/known_hosts:2
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /root/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).

如果需要任何详细信息，请告诉我。

【问题讨论】：

标签： ssh amazon-ec2 ubuntu-server

【解决方案1】：

您的文件名错误。不是

/home/$USER/.ssh/authorize_key

但是

/home/$USER/.ssh/authorized_keys

【讨论】：

这是我在帖子中的错误，修正了帖子中的文件名。
还是错了。该文件的权限是什么？
抱歉固定文件名，文件权限700，也试过777，同样Permission denied (publickey)。错误
运行 ls -ld ~$USER ~$USER/.ssh ~$USER/.ssh/authorized_keys 并使用信息更新问题。
导致检查组和文件权限，感谢修复。

【解决方案2】：

由于 .ssh/authorized_keys 未分配给 $USER 和组而出现问题。还有 chmod -rw-rw-r-- ( 664 ) 。

【讨论】：