4.创建SSH Key
因为本地git仓库和远程的github仓库之间是通过ssh加密传输的，所以需要创建一个SSH Key。
注意下面的实验中，Documents and Settings在win7下面是不能访问的，由于安全问题， 参考我目录下的文章，看怎么解决。
Windows下打开Git Bash，输入以下命令
ssh-keygen -t rsa -C [email protected]
console里面的输出结果是：
$ ssh-keygen -t rsa -C [email protected]
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Documents and Settings/dell/.ssh/id_rsa):
Created directory '/c/Documents and Settings/dell/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Documents and Settings/dell/.ssh/id_rsa.
Your public key has been saved in /c/Documents and Settings/dell/.ssh/id_rsa.pub.
dell@dell MINGW32 ~
$
找到.ssh文件夹，打开就可以看到两个文件id_rsa和id_rsa.pub，
打开id_rsa.pub，将其中的内容复制下来（这就相当于一把钥匙，将来传输时用），下面是我的：
