- create repository in github first
- do not initialize the new repository with README, license, or gitignore files.
- echo "# README_file" >> README.md
- git init
- git add README.md
- git commit -m "your commit message"
- git remote add origin git@github.com:/<repo_name>.git
- git push -u origin master
- check this URL for importing SSH key https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/