github Permission denied (publickey)
昨天在linux机子上装上了git，结果在连接github的时候出现 Permission denied (publickey)，然后按照http://help.github.com/ssh-issues/提示还是没有解决问题。
root@localhost:~/.ssh# ssh -vT [email protected]
OpenSSH_5.3p1 Debian-3ubuntu7, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /root/.ssh/config
debug1: Applying options for github.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to github.com [207.97.227.239] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.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: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5github2
debug1: match: OpenSSH_5.1p1 Debian-5github2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu7
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 'github.com' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
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: /root/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).
上面是调试信息，后来不得已我给github的管理员发了封求救邮件（把上面的信息发给他们），发完之后才意识到昨晚是平安夜，谁知道今天早上竟然收到回复了（太敬业了）。
It seems the key you have added to your account is bogus. Could you make sure you copy the id_rsa.pub contents without changing anything.
按照他们的回复我发现那个publickey是我通过Secure CRT连接上用vim选择后右键复制的，我发现貌似中间有很多多余的空格，这个可能与我vim的设置有关吧，于是我用cat复制那个pubkey，然后连接就ok了。
window下面可以用gui里面的帮助复制pubkey。
我郁闷的是为什么有多余的空格，那个github中
Account Settings”
>
Click “SSH Public Keys”
>
Click “Add another public key”的publickey还可以通过。