Been following a tutorial but it installs dev version of Magento2. How can I install the stable version 2.1.x ?
git clone https://github.com/magento/magento2.git
Checkout to the correct branch first.
git checkout 2.1
Edit: you can also checkout to a specific tag.
git tags will reveal what's available.
You may also want to look at installing from composer directly. I prefer it that way myself but you do need to sign up to Magento and get your authentication keys (which are like a username and password to download Magento 2) this way so it can be a bit of a pain to get going the first time.
You use a command like this:
composer create-project --repository-url=https://repo.magento.com/ magento/project-community-edition YOUR_FOLDER_NAME