Unlike Subversion, Git can be hosted using basic files and a simple access method such as SSH. This setup requires only three steps -

Create a dedicated user to host the Git repository -

# As ‘root’
useradd git

Add all developers’ SSH public keys to the Git user to enable password-less Git access -

# As ‘git’
mkdir ~git/.ssh
touch ~git/.ssh/authorized_keys
chmod 700 ~git/.ssh
chmod 600 ~git/.ssh/authorized_keys
cat developer1_key.pub >> ~git/.ssh/authorized_keys
cat developer2_key.pub >> ~git/.ssh/authorized_keys

Create a Git repository in the new user’s home directory and provide the URL to all developers -

# As ‘git’
mkdir ~/repo.git
cd ~/repo.git
git init --bare
# Repository can now be accessed at git@hostname:repo.git

Finally as an added step for security, lock down the git account to prevent any shell access -

# As 'root'
chsh -s /usr/bin/git-shell git    # Prevent full login for security reasons