this post was submitted on 01 Aug 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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You fail to realize that each distro is maintained by different people. Your reasoning would make sense if the "core debian" was maintained and packaged by the same people who maintained and packaged *ubuntu.
The end user would download "core debian" from debian, and the *ubuntu "flavor" from *ubuntu. Installing debian then going "apt install kubuntu" wouldn't work because kubuntu is not in the debian repository.
If debian changed their downloadable "core debian", it could make it incompatible with what's in the kubuntu repository. They are not maintained by the same employees of "Linux inc."
I very well realize this. Packages are maintained by different people too!
The idea is that installing a *ubuntu would literally be the same as installing one of the many packages already available. It works for all those packages, so why wouldn't it work here?
Yes, that is correct. I apologize if you misunderstood what I said. I did not mean to say that this is the current state. This is what I think how things should be.
Though for the case of kubuntu, it apparently is pretty close. You can in fact already do "apt install kubuntu-desktop", but you have to be on regular Ubuntu instead of debian. Which is fine, since Ubuntu changes a lot more about debian than just pre installed packages, so it works out for my example.
I do not suggest they should!
When debian maintainers need to release an update of a debian package, they need to make sure it doesn't break compatibility with ... other debian packages - yes maintained by other people. They don't need to test it with a dozen *ubuntu and other .deb variants, nor coordinate with those other maintainers and wait for them to release their new, compatible versions.
It's already hard to do that within the same distro.
I am not sure if you are onto something or you don't understand the proposition. e.g. how does KDE or any other DE developer maintain their packages on debian? Do they not? And its up to debian developers to decide what version of KDE they use? If thats the case then I see your point, which would make it very hard for the so-called "kubuntu" package maintainer, because they have to rely on what debian maintainers do.
Yes, that's what I mean. For example suppose you had this mixed solution (core comes from debian repository, "kubuntu personality" from kubuntu repository).
Then debian maintainers release updates for their packages - which they tested and validated in systems that use only other debian packages.
Next time you update your system, it may happen that the new version of debian components are no longer compatible with the kubuntu components.
Debian won't wait for or check if every distro who uses their "core" has tested debian changes and released compatible new packages of their own.
Probably most debian based distros simply repackage many base debian components with minimum or no changes, but they know those releases are compatible with their own "customized" packages, and can have control of their dependencies.
Edit: I didn't address one of your questions directly: No, developers and maintainers of a linux system component (as kde, and even the kernel) not necessarily are the maintainers of a specific distro packages.
For example, kernel decelopers and maintainers release a new kernel release independent of any distro. It's up to the distro maintainers to test and package this, then make it available in their repo.
No? do suggest debian kept their install package frozen forever just to make this proposition viable?