一 、设置Git的user name和email：
$ git config --global user.name "xuhaiyan"
$ git config --global user.email "xxxxxx@gmail.com"
（引号中自己的名字和邮箱）
二、生成SSH密钥过程：
1.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
2.生存密钥：
$ ssh-keygen -t rsa -C “xxxxx@gmail.com”
按3个回车，密码为空。
Your identification has been saved in /home/xxx/.ssh/id_rsa.
Your public key has been saved in /home/xxx/.ssh/id_rsa.pub.
The key fingerprint is:
………………
最后得到了两个文件：id_rsa和id_rsa.pub
3.添加密钥到ssh：ssh-add ~/.ssh/id_rsa
需要之前输入密码。
4.在github上添加ssh密钥，这要添加的是“id_rsa.pub”里面的公钥。
打开https://github.com/，登陆xuhaiyan825，然后添加ssh。
5.测试：ssh git@github.com
The authenticity of host ‘github.com (207.97.227.239)’ 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 ‘github.com,207.97.227.239′ (RSA) to the list of known hosts.
ERROR: Hi tekkub! You’ve successfully authenticated, but GitHub does not provide shell access
Connection to github.com closed.
查看密钥：
1、查看ssh文件夹
ls ~/.ssh/
2、进入到ssh文件夹
cd .ssh
3、查看密钥（要复制要服务器的那个）
more id_rsa.pub
