404 on attempting to install Musescore 3 on Linux

• Oct 31, 2019 - 04:09

I'm running XFCE on my Chromebook using crouton (though I don't know the exact operating system or architecture or whatever; I'm no Linux wiz), trying to install Musescore 3. Musescore 2 installed just fine, though I didn't realize it was Musescore 2 until I tried to load a score on my main computer - apparently my powers of observation are completely absent. Anyway, that's why I tried to install version 3.
I followed the directions on the package page (I'm using ppa):

>sudo add-apt-repository ppa:mscore-ubuntu/mscore3-stable

No errors here, everything seems ship-shape.

>sudo apt-get update

Here's where the problem occurs. All the localizations come in fine, then I see:

>Err:8 http://ppa.launchpad.net/mscore-ubuntu/mscore3-stable/ubuntu xenial/main amd64 Packages
> 404 Not Found [IP: 80]

And that's a problem, as the lines at the end of it say:

>W: The repository 'http://ppa.launchpad.net/mscore-ubuntu/mscore3-stable/ubuntu xenial Release' does not have a Release file.
>N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
>N: See apt-secure(8) manpage for repository creation and user configuration details.
>E: Failed to fetch http://ppa.launchpad.net/mscore-ubuntu/mscore3-stable/ubuntu/dists/xeni… 404 Not Found [IP: 80]
>E: Some index files failed to download. They have been ignored, or old ones used instead.

So there's no release file, huh?
So I try the next step,

>sudo apt-get install musescore3

which should be right. Unsurprisingly, I get the error

>E: Unable to locate package musescore3

I need some help, or insight. Am I do something wrong? Is it my operating system? Again, Musescore 2 worked fine. It even ran, was able to connect to the sound card (though the MIDI keyboard had trouble - but that's a different topic entirely), and load and save files. Is it something on Musescore's end? Did they forget to upload a release file?
Something worth noting is I tried to install the nightly instead. This worked fine, but - the nightly was 2.1, not any future version. So I wager the Linux versions are just massively behind...despite mscore3 being listed on the package page.


Note that the official linux package for MuseScore is the AppImage and only the AppImage. All other packages are a community-contributed effort.

That being said; according to this post from the current package maintainer 3.x indeed isn't available on Xenail. If you update to at least Bionic (18.04 LTS) you will be able to use the PPA.

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