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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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Can someone explain Universal Blue (and images based on it) to me? (discuss.tchncs.de)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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I think I get the idea of Fedora Atomic (Silverblue, Kionite, etc.), but I do not get what uBlue is about.

Are those just another "ooh it's distro X but with preinstalled Y" or are those some soft of overlays on top of Fedora? Can't they just be some install scripts? Why not just base Fedora Silverblue? Maybe I don't get the idea, because people seem hyped.

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[–] [email protected] 5 points 3 months ago* (last edited 3 months ago)

Starting to write about this, it is actually really complex as rpm-ostree is really powerful. Read the man entry, it tells a lot.

Ostree can use ostree remotes (like git repos) or "ostree native containers" i.e. OCI containers (like Docker, Podman etc. which uBlue uses.

the rpm part meanwhile allows to add any RPM to the image, but it takes way longer. So doing this centrally is more efficient.

This has tons of benefits like adding packages that Fedora cannot legally add, or doing opinionated changes, or unstable stuff like drivers.

Instead of having every user apply them, this does them once and by that increases reproducibility.