A Linux repository is a storage location where your system installs OS updates and applications. Each repository is a collection of software hosted on a remote server and intended to be used for installing and updating software packages.
They are commonly used for a storage location either remote or on your local machine. They often work with a version control system and store different versions of software or application in the time.
On Ubuntu, all Ubuntu-based distros, Debian, and all Debian-based distros, you can file the list of repos(repositories) in /etc/apt/sources.list. You can open the file using nano like that:
sudo nano /etc/apt/sources.list
- Main – Canonical-supported free and open-source software.
- Universe – Community-maintained free and open-source software.
- Restricted – Proprietary drivers for devices.
- Multiverse – Software restricted by copyright or legal issues.
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