this post was submitted on 14 Nov 2023
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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No. All the official packages in the
mainrepo get security updates from the Debian security team.Only the packages in
contrib,non-freeandnon-free-firmwaredon't have official security updates and rely on the package maintainers. These are not considered part of the Debian distro, and I don't even have them enabled on my servers.Out-of-the-box, Debian only enables the
mainrepo, plus thenon-free-firmwareone if any of your devices require it (e.g. Nvidia graphics, Realtek Bluetooth, etc). You have to manually enablecontribandnon-free, and by doing that, it's assumed you know what you're doing.In the case of
non-freeandnon-free-firmware, they can be closed source software (like the Nvidia drivers) or have a non-open-source license that doesn't allow distributing modified versions. In those cases, the Debian team is unable to patch them even if they wanted to.