一，在github上建仓库 react-js-antd-demo：
二：将远程仓库与本地仓库关联
git remote add origin git@github.com:begin256/react-js-antd-demo.git
三：将本地仓库的内容推送到远程（github）
git push -u origin master
github中的react-js-antd-demo仓库内容更新成功！
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四：从github克隆仓库：
git clone git@github.com:begin256/node-demo.git
//if not work, use this:
git clone https://github.com/begin256/node-demo.git
五：同一台电脑上创建两个git ssh key方法
//add a git ssh key:
//input a new email in a new path:
ssh-keygen -t rsa -C "xxxxxx@qq.com"
//input a rsa name in "Enter file in which to save the key...",for example, "office_id_rsa",enter several times, then you a got another ssh key.