我不想再补充另一个答案，但我的特定场景在这里没有完全涵盖。我有一个本地回购，其中有我想保存的更改历史，还有一个在Github上为我创建的非空回购(即默认的README.md)。是的，你总是可以将Github回购重新创建为空回购，但在我的情况下，其他人有权限创建这个特定的回购，如果有一个简单的解决方案，我不想麻烦他。

在这种情况下，当你在设置远程源后尝试git push时，你会遇到这个错误:

 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to 'git@github.com:<my repo>.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.

正如错误所示，我需要在设置远程原点后执行git拉取，但我需要指定——allow-unrelated-histories选项。如果没有这个选项，git pull会发出警告:没有共同提交。

下面是对我有效的命令序列:

git remote add origin <github repo url>
cp README.md README.md-save
git pull origin master --allow-unrelated-histories
mv README.md-save README.md
git commit -a
git push

这个对我来说很有用(需要的时候留作参考)

# Go into your existing directory and run below commands
cd docker-spring-boot
echo "# docker-spring-boot" >> README.md
git init
git add -A
git commit -m "first commit"
git branch -M master
git remote add origin https://github.com/devopsmaster/docker-spring-boot.git
git push -u origin master
                

Follow below gitbash commands to push the folder files on github repository :-
1.) $ git init
2.) $ git cd D:\FileFolderName
3.) $ git status
4.) If needed to switch the git branch, use this command : 
    $ git checkout -b DesiredBranch
5.) $ git add .
6.) $ git commit -m "added a new folder"
7.) $ git push -f https://github.com/username/MyTestApp.git TestBranch
    (i.e git push origin branch)

在总结;

git init
git status
git add "*"
git commit -m "Comment you want"
git remote add origin  https://link
git push  -u origin master

我想与您分享一个源代码，以便您更容易地了解Git。

https://try.github.io/levels/1/challenges/1

我不想再补充另一个答案，但我的特定场景在这里没有完全涵盖。我有一个本地回购，其中有我想保存的更改历史，还有一个在Github上为我创建的非空回购(即默认的README.md)。是的，你总是可以将Github回购重新创建为空回购，但在我的情况下，其他人有权限创建这个特定的回购，如果有一个简单的解决方案，我不想麻烦他。

在这种情况下，当你在设置远程源后尝试git push时，你会遇到这个错误:

 ! [rejected]        master -> master (fetch first)
error: failed to push some refs to 'git@github.com:<my repo>.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.

正如错误所示，我需要在设置远程原点后执行git拉取，但我需要指定——allow-unrelated-histories选项。如果没有这个选项，git pull会发出警告:没有共同提交。

下面是对我有效的命令序列:

git remote add origin <github repo url>
cp README.md README.md-save
git pull origin master --allow-unrelated-histories
mv README.md-save README.md
git commit -a
git push

Git自2005年问世以来一直是版本控制系统的首选。大约87%的开发者使用Git作为他们的版本控制系统。

但是如果你有一个已经存在的项目，并且你想要推送到远程服务器中的Git，请按照以下步骤执行:

Go to the terminal of your project directory You need to initialize your project git using git init Create a .gitignore file and it is actually a text file that tells Git which files or folders to ignore in a project. Stage your files using git add . Commit your changes to your local repository with an appropriate commit message: git commit -m "my first commit" In this step, you just need to create a repository in any one of the distributed version control systems like GitHub or Bitbucket Use this Git command to link your local repository with that of the remote: git remote add <your-remote-name> <your-remote-url>

所以，如果你的GitHub repo-url是https://github.com/your-github-username/new-repository.git，那么Git命令就变成:

git remote add origin https://github.com/<your-github-username>/new-repository.git

将代码推送到远程GitHub存储库 Git push origin master

注意:git push命令需要两个参数:远程存储库的名称(origin)和要推送的分支(这里master是每个存储库的默认分支)。

详细信息请参考这个博客。