git upload existing repository code example
Example 1: git push new repo to remote
$ git remote add origin <remote repository URL>
# Sets the new remote
# Push the changes in your local repository to GitHub.
$ git push -u origin master
# Pushes the changes in your local repository up to the remote repository you specified as the origin
Example 2: how to upload existing project to github
git remote add origin remote repository URL
git remote -v
git push -f origin master