git和GitHub

当从本地代码库整合到GitHub（远程代码库）时，有可能会被指责。

No refs in common and none specified; doing nothing.
Perhaps you should specify a branch such as 'master'.
Everything up-to-date

似乎是因为远程仓库中没有主分支，所以需要在推送时添加选项。

$ git push -u origin master