假设git例如，下面的问题时，远程推送：

[fulinux@ubuntu learngit]$ git push -u origin master

ssh: connect to host github.com port 22: Connection refused

fatal: Could not read from remote repository.

Please make sure you have the correct access rights

and the repository exists.

能够採用例如以下方法：

[fulinux@ubuntu ~]$ vim .ssh/config

Host github.com

User fulinux@sina.com

Hostname ssh.github.com

PreferredAuthentications publickey

IdentityFile ~/.ssh/id_rsa

Port 443

測试连接是否成功：

[fulinux@ubuntu ~]$ ssh -T git@github.com

Hi fulinux! You've successfully authenticated, but GitHub does not provide shell access.

推送：

[fulinux@ubuntu learngit]$ git push -u origin master

The authenticity of host '[ssh.github.com]:443 ([192.30.252.151]:443)' can't be established.

RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '[ssh.github.com]:443,[192.30.252.151]:443' (RSA) to the list of known hosts.

Counting objects: 23, done.

Delta compression using up to 2 threads.

Compressing objects: 100% (18/18), done.

Writing objects: 100% (23/23), 1.87 KiB | 0 bytes/s, done.

Total 23 (delta 6), reused 0 (delta 0)

To git@github.com:fulinux/learngit.git

 * [new branch]      master -> master

Branch master set up to track remote branch master from origin.