ssh-keygen -t rsa -C "your_email@example.com"
cat ~/.ssh/id_rsa.pub

Copy the content in the SSH keys of your Github profile
Test:

 ssh -T git@github.com

in your local copy of the repository:

git remote set-url origin git@github.com:username/your-repository.git

Then once you changed something

git commit -am "your comment"
git push

• https://gist.github.com/developius/c81f021eb5c5916013dc
• https://www.shellhacks.com/git-config-username-password-store-credentials/
• https://fling.seas.upenn.edu/~giesen/dynamic/wordpress/equivalent-commands-for-git-svn-and-cvs/