1.创建新项目上传
cd parent_dir //进入项目父目录
mkdir gitDemo //创建项目目录 gitDemo
cd gitDemo //进入项目目录
git init //初始化空的 git 仓库
touch README.md
git add README.md //这两行添加简单的 README.md 文件
git commit -m "first commit" //提交时附加的信息
git remote add origin https://coding.net/codingTutorial/gitDemo.git //添加一个名为 origin 的远端（ url 为 git 地址）
git push -u origin master //将该目录下的文件推送到远端（origin）上的 "master" 分支可能会遇到的问题
a.如果是首次使用，会提示你先设置好用户名和邮箱，可以在 cmd 中输入：
git config --global user.email "you@example.com"
git config --global user.name "Your Name"
b.git push失败，出现以下提示
! [rejected] master -> master (fetch first)
error: failed to push some refs to 'https://github.com/dummymare/Hello-World.git'
hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
解决方法：
原因：本地版本和主干上的有差异先pull远端的版本，解决了冲突才能push
git pull -u origin master
然后再
git push -u origin master
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