ssh 无密码登录失败，权限被拒绝（公钥）

Question

我正在尝试在从 VM A 到 VM B 的两个新 Linux VM 上设置无密码 ssh，但我遇到了权限问题。我在两个虚拟机上都安装了 openssh-server 并配置了 /etc/ssh/sshd_config 如下：

RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile     %h/.ssh/authorized_keys
PasswordAuthentication no

所有其他字段都是它们的默认值。在 VM 上，AIssh-keygen -t rsa使用默认选项运行。我尝试使用，ssh-copy-id但出现权限被拒绝（公钥）错误。然后我手动将 id_rsa.pub 复制到 VM B 上的 authorized_keys。我用于chmod 700~/.ssh、chmod 600~/.ssh/id_rsa 和chmod 644~/.ssh/id_rsa.pub、~/.ssh/authorized_keys 和 ~/ .ssh/known_hosts 在两个 VM 上。运行 ssh -v VM-B 后，我得到以下输出：

OpenSSH_5.9p1 Debian-5ubuntu1.1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to hadoop-slave-1 [192.168.86.134] port 22.
debug1: Connection established.
debug1: identity file /home/hduser/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/hduser/.ssh/id_rsa-cert type -1
debug1: identity file /home/hduser/.ssh/id_dsa type -1
debug1: identity file /home/hduser/.ssh/id_dsa-cert type -1
debug1: identity file /home/hduser/.ssh/id_ecdsa type -1
debug1: identity file /home/hduser/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1.1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 45:48:fd:f0:db:1a:2a:c0:80:17:ec:18:5a:dd:f2:a5
debug1: Host 'hadoop-slave-1' is known and matches the ECDSA host key.
debug1: Found key in /home/hduser/.ssh/known_hosts:1
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/hduser/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/hduser/.ssh/id_dsa
debug1: Trying private key: /home/hduser/.ssh/id_ecdsa
debug1: No more authentication methods to try.
Permission denied (publickey).

还有什么我需要做的吗？

Answer 1

权限问题的另一个原因是在主目录上设置的权限。检查这是否为 755 或更少。

有关更多详细信息，请参阅http://www.openssh.org/faq.html#3.14。