我尝试使用 github，所以我遵循了帮助文档。但是当我使用这个命令时：ssh -vT git@github.com我得到了这样的错误：
jacos@Jing:~/.ssh$ ssh -vT git@github.com
OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011
debug1: Reading configuration data /home/jacos/.ssh/config
debug1: Applying options for github.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to ssh.github.com [207.97.227.248] port 443.
debug1: Connection established.
debug1: identity file /home/jacos/.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/jacos/.ssh/id_rsa-cert type -1
debug1: identity file /home/jacos/.ssh/id_dsa type -1
debug1: identity file /home/jacos/.ssh/id_dsa-cert type …