Initialising
Go into your local folder and make it suitable for git.
git init
Build a connection between local and remote repository.
git remote add origin https://github.com/wofuerGitHub/Fundamentals_Overview.git
Create a remote git-repository – easiest to remember – with the same folder name.

Add all local files.
git add .
Create a first commit called “init”.
git commit -m "init"
With the first upload define the standard branch.
git push --force --set-upstream origin master
Information about the repository-status
Getting all available information about the repository.
git status
Push local changes
To push your local changes to the repository.
git add .
git commit -m "message"
git push
Pull remote changes
To get the newest changes in the repository to your local storage.
git pull
Clone repository
To get a complete repository locally installed.
git clone https://github.com/wofuerGitHub/Fundamentals_Overview.git
Further information
Special thanks to Roger Dudler and Thomas Leister for their instructions.