//fatal: remote origin already exists.
git remote rm origin
git remote add origin git@github.com:username/myapp.gitgit remote set-url origin https://github.com/your/repository
git remote set-url origin https://github.com/your/repositorygit remote rm origin
git remote add origin git@github.com:username/myapp.git
git remote set-url origin git@github.com:ppreyer/first_app.git$ git remote set-url origin git@github.com:ppreyer/first_app.git
$ git remote set-url origin git@github.com:ppreyer/first_app.gitcd existing_folder
git init --initial-branch=master
git remote add origin https://:@gitlab.cern.ch:8443/aaboulho/zdzd.git
git add .
git commit -m "Initial commit"
git push -u origin mastergit remote remove origin
#solved