Install the GPG Authentication Key.
(If you are on Shion OS 1.1.2 the GPG key is already installed) To install the GPG key, run the below command in a terminal.
cd /tmp && wget http://shionos.s3.amazonaws.com/repo/key/deb.gpg.key -O shion-public.deb.key.gpg && sudo apt-key add /tmp/shion-public.deb.key.gpg
Adding the Main Repository
To add the main repository to your sources, run the following commands in a terminal.
sudo wget http://shionos.s3.amazonaws.com/repo/source%20lists/shion-os-1.list -O /etc/apt/sources.list.d/shion-os-1.list
sudo apt-get update
Adding the Beta Repository
The beta repository contains package versions that are being tested or are works in progress. To add the beta repository to your sources, run the following commands in a terminal.
sudo wget http://shionos.s3.amazonaws.com/repo/source%20lists/shion-os-1-beta.list -O /etc/apt/sources.list.d/shion-os-1-beta.list
sudo apt-get update