Ubuntu Repositories

https://help.ubuntu.com/community/Repositories/Ubuntu

Introduced to this when trying to understand how Buildfarm work.

The four main repositories are:

1. Main - Canonical-supported free and open-source software.
2. Universe - Community-maintained free and open-source software.
3. Restricted - Proprietary drivers for devices.
4. Multiverse - Software restricted by copyright or legal issues.