实现免费网站部署首先得在github注册账号，并下载Git软件
一 、设置Git的user name和email：
1 $ git config --global user.name "Oainin"
2 $ git config --global user.email "postmaster@oainin.com"
（注意空格问题）
二、生成SSH密钥过程：
查看是否已经有了ssh密钥：cd ~/.ssh 如果没有密钥则不会有此文件夹，有则备份删除
1、生成新的Key：（引号内的内容替换为你自己的邮箱）
ssh-keygen -t rsa -C "postmaster@oainin.com"
2、输出显示：
Generating public/private rsa key pair. Enter file in which to save the key (/Users/your_user_directory/.ssh/id_rsa):
3、直接回车，不要修改默认路劲。
Enter passphrase (empty for no passphrase): Enter same passphrase again:
设置一个密码短语，在每次远程操作之前会要求输入密码短语！闲麻烦可以直接回车，不设置。
4、成功：
$ ssh-keygen -t rsa -C "postmaster@oainin.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/Amos/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Users/Amos/.ssh/id_rsa.
Your public key has been saved in /c/Users/Amos/.ssh/id_rsa.pub.
三、提交公钥：
1、 找到.ssh文件夹，用文本编辑器打开“id_rsa.pub”文件，复制内容到剪贴板。
2、 打开
https://github.com/settings/ssh ，点击 Add SSH Key 按钮，粘贴进去保存即可。
四、测试
$ssh git@github.com
PTY allocation request failed on channel 0
Hi Oainin! You've successfully authenticated, but GitHub does not provide shell access.
Connection to github.com closed.
