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git 提交命令
         git init
         git add README.md
         git commit -m "这次提交的改动信息"
         git remote add  origin git@github.com:Github的用户名/仓库名
         git push -u  origin master

可能出现的问题：

• 执行git add README.md时出现fatal: pathspec ‘README’ did not match any files

  • 原因：该命令是将文件加至暂存区域，表示该文件找不到，即是在目录里面不存在，创建好文件再添加。

• 执行第4条命令行时报错“fatal: remote origin already exists.”

  • 解决：先输入git remote rm origin后重新输入一次即可。

• 执行git push -u origin master时报错信息如
  “ ! [rejected] master -> master (fetch first)
  error: failed to push some refs to ‘git@github.com:levyc/SpringAccessDB.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.”

  • 原因：github远程仓库发生了变化，但是本地没有fetch（抓取）新变化下来就push到远程仓库。只要先执行git pull –rebase origin master获取最新改动即可解决。

• -push成功后但是Github上没有本地项目的文件。

  • 原因：没有将项目里面的文件添加进去就commit（提交）了。用git add . 将目录内所有文件添加进暂存区域再提交即可。