De GitHub.com

… or create a new repository on the command line

echo "# ComandosGit" >> README.md

git init

git add README.md

git commit -m "first commit"

git branch -M main

git remote add origin [url]

git push -u origin main

…or push an existing repository from the command line

git remote add origin [url]

git branch -M main

git push -u origin main