git init
git add readme.txt
git commit -m "wrote a readme file"
git clone git@github.com:edwnorton/test.git
git remote add origin git@github.com:edwnorton/test.git
git push -u origin master
git push origin master
查看分支：git branch
创建分支：git branch <name>
切换分支：git checkout <name>
创建+切换分支：git checkout -b <name>
合并某分支到当前分支：git merge <name>
删除分支：git branch -d <name>
强推: git push --force origin master