{nav icon=home, name=Main Page > icon=info-circle, name=PureOS > icon=th-large, name=Software Center > icon=sellsy, name=Software Sources} How to add software sources ("repos") --- Start `Software & Updates` app: {F29101, size=full, alt=su1} click //Other Software// tab and click the !!Add...!! button, then enter the repo line: {F29103, size=full, alt=su2} and click the !!Add Source!! button. If you need to add keys for the newly added repo, check the //Authentication// tab: {F29105, size=full, alt=su4} === Alternative method === By default, you should have this line in your `/etc/apt/sources.list` file: `deb https://repo.pureos.net/pureos green main` If you want to add more repos, just add it below the mentioned line.