Updates were rejected because the tip of your current branch is behind

Git在push推送时，报错提示信息如下：

hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. If you want to integrate the remote changes,
hint: use 'git pull' before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.

原因分析：

是由于本地和远程仓库两者代码文件不同步，因此需要先pull，进行合并然后再进行push

解决方法：

1、先使用pull命令：

git pull --rebase origin master

2、再使用push命令

git push -u origin maste