关联本地仓库

  $mkdir "my flie"
  $cd my flie
  $git init
  $echo "# my flie" >> README.md
  $git add README.md
  $git commit -m "first commit"
  $git remote add origin https://git.coding.net/HuangfanDD/my flie.git
  $git push -u origin master

如果执行git push -u origin master 报错：

    $ git push -u origin master
    To git@github.com:******/Demo.git
     ! [rejected] master -> master (non-fast-forward)
    error: failed to push some refs to         'git@github.com:******/Demo.git'
    hint: Updates were rejected because the tip of your current branch is behind
    hint: its remote counterpart. Merge the remote changes (e.g. 'git pull')
    hint: before pushing again.
    hint: See the 'Note about fast-forwards' in 'git push --help' for details.

是因为远程repository和我本地的repository冲突导致的，而在创建版本库后，在版本库页面点击了创建README.md文件的按钮创建了说明文档，但是却没有pull到本地。这样就产生了版本冲突的问题。

有如下几种解决方法：

1.使用强制push的方法：

  $ git push -u origin master -f 

这样会使远程修改丢失，一般是不可取的，尤其是多人协作开发的时候。

2.push前先将远程repository修改pull下来

  $ git pull origin master

  $ git push -u origin master

3.若不想merge远程和本地修改，可以先创建新的分支：

  $ git branch [name]

然后push

  $ git push -u origin [name]