this post was submitted on 16 Jun 2025
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Linux

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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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Jellyfin assistance (lemmy.ml)
submitted 4 days ago by Kelp@lemmy.world to c/linux@lemmy.ml
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Hello, I yet again come, hat in hand, for assistance from those wiser in the ways of the Linux. I’m having a bit of an issue downloading Jellyfin on my ElementaryOS laptop. I’ve tried all the guide on the first few pages of ddg only to receive errors after entering the comman “ sudo apt-get update “. I get ERR:3 https//repo.jellyfin.org/debian circle Release 404 Not found.

If someone can point me the way I’d be most appreciative

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[–] sgh@lemmy.ml 5 points 3 days ago (2 children)

Not OP, but it was very simple if you have already seen that error.

First of all, there is one single easily parsable error.

https://repo.jellyfin.org/debian produced a 404 error, thus the URL is invalid.

Let's ignore why it's invalid for a second.

This error happens after apt update, thus we can deduce the following:

  • It's supposed to be an apt repository URL (To experienced users, it effectively looks like a repository URL)
  • This repository URL does not work
  • As in 99% of cases, this URL is likely located in a configuration file in the standard location, /etc/apt/sources.list.d/

Back to why it's invalid, maybe it used to be valid in the past, or there is a temporary server error, this can be verified with the official documentation.

If the documentation does not mention this repository URL, then it's a mistake to use it.

This is a good moment to google this URL and find out why/which guide tells you to use it, and to analyze which steps they made you take.

From there, reverse those steps.

Even if you hadn't found this guide, you can be sure that by looking into /etc/apt/sources.list.d you would've found that file containing that URL, simply removing the file or URL would've removed the error.

Lastly, you look for either the official documentation, or a more reliable guide.

[–] whostosay@lemmy.world 3 points 3 days ago

This was cool, thank you for doing it.

Sometimes it's hard to switch gears and understand this OS/language, but you did an excellent job of bridging that gap. Thank you.