1.git init
2.git add.
3.git add README.md
4.git commit -m "init"
5.git remote add origin https://github.com/lucasyue/jmonitor.git
6.git push -u origin master
origin、master解释：http://lishicongli.blog.163.com/blog/static/1468259020132125247302/
7.git.refs、branch、repository原理：https://git-scm.com/book/zh/v1/Git-%E5%86%85%E9%83%A8%E5%8E%9F%E7%90%86-Git-References