I have installed Magento 2.0 rc in AWS and tried to update my
composer.json to update it to Magento 2.0.
Ran the command
sudo composer config composer.json but received an red box with the error
composer.jsonis not defined.
I've also tried to run the following command with no response from bash.
composer config repositories.magento composer http://repo.magento.com
Your help is much appreciated. George Ng