在本地创建了一个项目 执行

    git init 

然后在github后台创建新项目的时候 勾选了Initialize this repository with a README
然后github默认生成了一个README.md 文件。
git客户端关联远程版本库

     git remote add origin git@github.com:<<your name>>/learngit.git
     git commit -m 'first'
     git push

然后报错
error: failed to push some refs to 'https://github.com/songlin51/jandan.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

大致意思是远程版本库版本比你自己的新，提示pull一下，但是我pull之后并没有任何更新，网上查了一下，远程README.md文件直接pull不下来，需要用命令

    git pull --rebase origin master

然后git push 推送上去了