我的是脑是64位的ubuntu13.04，openssh-server已经安装了，githup也弄好了，可是我用ssh -T git@githup.com连接时出现了ssh: connect to host githup.com port 22: Connection timed out，不知道是哪里出现了问题，我在电脑上输入ssh localhost 出现了下面的提示:
zlk@zlk-Lenovo-IdeaPad-Y400:~$ ssh localhost
The authenticity of host 'localhost (127.0.0.1)' can't be established.
ECDSA key fingerprint is fa:ac:e7:b2:56:ce:e1:d7:3b:46:6e:ac:c2:99:0a:5c.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.
zlk@localhost's password:

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.

Welcome to Ubuntu 13.04 (GNU/Linux 3.8.0-25-generic x86_64)

• Documentation: https://help.ubuntu.com/

0 packages can be updated.
0 updates are security updates.
这是已经说明我的ssh已经设置好了，可是怎么连不上，githup上的SSH KEY我也设置了，这是怎么回事？