我无法SSH到我的Ubuntu服务器（我曾经能够但没有尝试了几个月）。
通常我使用
ssh user@ipaddress 但是我得到错误的Permission denied (publickey).
所以我试了
ssh -o PubkeyAuthentication=no user@ipaddress
但我得到相同的错误Permission denied (publickey).
我试过了
ssh -v user@ipaddress OpenSSH_5.2p1, OpenSSL 0.9.8y 5 Feb 2013 debug1: Reading configuration data /etc/ssh_config debug1: Connecting to ipaddress [ipaddress] port 22. debug1: Connection established. debug1: identity file /Users/my-mac/.ssh/identity type -1 debug1: identity file /Users/my-mac/.ssh/id_rsa type 1 debug1: identity file /Users/my-mac/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.0p1 Debian-3ubuntu1 debug1: match: OpenSSH_6.0p1 Debian-3ubuntu1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.2 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: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'ipaddress' is known and matches the RSA host key. debug1: Found key in /Users/my-mac/.ssh/known_hosts:11 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received 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 public key: /Users/my-mac/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /Users/my-mac/.ssh/identity debug1: Trying private key: /Users/my-mac/.ssh/id_dsa debug1: No more authentication methods to try. Permission denied (publickey).
我不知道还有什么要尝试访问我的服务器。
ps这里是文件烫发
drwxr-xr-x 6 my-mac staff 204 2 Oct 08:16 . drwxr-xr-x+ 31 my-mac staff 1054 21 Aug 07:35 .. -rw------- 1 my-mac staff 1743 12 Aug 2011 id_rsa -rw------- 1 my-mac staff 416 12 Aug 2011 id_rsa.pub -rw------- 1 my-mac staff 4390 2 Oct 08:16 known_hosts -rw------- 1 my-mac staff 4404 2 Oct 08:03 known_hosts.old
您的服务器只接受publickeyauthentication，并且您可以从客户端提供的私钥都不匹配相应的公钥（对于您尝试authentication的用户）。
这可能是因为：
~/.ssh/authorized_keys和/或~/.ssh丢失或设置了错误的权限（将StrictModes设置为默认值）。 SELinux可以在客户端产生类似的错误。 检查自上次login以来是否启用。如果这是您的情况，您可以执行两项操作：
如果此服务器处于安全环境且不需要它，请将其禁用。 （在/ etc / selinux中将其设置为宽容）
通过发出以下命令“启用”你的ssh（假设你的主目录，如果不正确则更换）。
restorecon -R -v /home/my-mac/.ssh
另外：如果你的文章末尾的目录列表是服务器端（请说明），那么你只是缺less你的authorized_keys文件与你的pub key。