git-push报错failed to push some refs to_can't push refs to remote. try running "pull" firs

appledeMacBook-Pro-2:git教程 apple$ git push -u origin master
To ssh://git@dev.**.com.cn:222/yueyin/mylab.git
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to ‘ssh://git@dev.*.com.cn:222/yueyin/mylab.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.
原因是你在push master分支的时候你的本地路径下没有readme.md文件
执行（pull=fetch+merge）

git pull --rebase origin master
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appledeMacBook-Pro-2:git教程 apple$ git pull --rebase origin master
From ssh://dev.upbox.com.cn:222/yueyin/mylab
 * branch            master     -> FETCH_HEAD
First, rewinding head to replay your work on top of it...
Applying:  Please enter the commit message for your changes. Lines starting
Applying: secondCOMMIT
Applying: firstCommit
Applying: add
Applying: secondCommit
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然后再push $ git push -u origin master

appledeMacBook-Pro-2:git教程 apple$ git push -u origin master
Counting objects: 2164, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (711/711), done.
//后面就是下载文件了
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