README.md

Create a new repository on the command line

touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin git@github.com:bstaub/shellscripts.git
git push -u origin master

Push an existing repository from the command line

git remote add origin git@github.com:bstaub/shellscripts.git
git push -u origin mastera