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The Remote is Git’s network backup system. GitHub is nothing more than a Remote manager with a Web interface. The connection uses the SSH protocol.

Installing Git on the Server

sudo apt-get install git

Creating the Git User

The “git” user will allow us to interact with the remote repository.

sudo adduser --system --shell /bin/bash --group --disabled-password --home /var/git/ git

Then change the owner of the “/var/git” directory, which was created during git installation and is the home directory of the git user.

sudo chown git:git /var/git

Configuring SSH Access for This User

Generate the SSH key for the git user.

ssh-keygen -t rsa

Select the default key storage directory. The “id_rsa” file contains the private key and the “id_rsa.pub” file contains the public key. Change the access permissions for the private and public keys.

sudo chmod 755 ~/.ssh
sudo chmod 600 ~/.ssh/id_rsa
sudo chmod 644 ~/.ssh/id_rsa.pub

Then copy the public key to a new “authorized_keys” file and modify its access permissions.

cp ~/.ssh/id_rsa.pub /var/git/.ssh/authorized_keys
sudo chmod 644 ~/.ssh/authorized_keys

Testing

To test the SSH connection, simply connect to the git user with an SSH client:

ssh [email protected]

Creating the Repository

sudo mkdir /var/git/my-repo.git
sudo cd /var/git/my-repo.git
sudo git init --bare
sudo chown -R git:git /var/git/my-repo.git

Here, we create the directory that will contain the project, initialize the git project (the –bare argument indicates that the repository is empty) and change the project’s owner.

Cloning and Committing to the Remote

git clone [email protected]:my-repo.git

A message indicating that the cloned repository is empty will appear.