Sudo apt-get update gives errors in the end

Support & Help Requests
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#1

Hello!

I wanted to know what does the following mean and if I can fix these issues:

W: http://deb.playonlinux.com/dists/trusty/InRelease: Signature by key 74F7358425EEB6176094C884E0F72778C4676186 uses weak digest algorithm (SHA1) W: http://liveusb.info/multisystem/depot/dists/all/Release.gpg: Signature by key 32027DE3D67157C45E69C0AE4E940D7FDD7FB8CC uses weak digest algorithm (SHA1) W: The repository 'http://ppa.launchpad.net/ubuntu-audio-dev/ppa/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/ubuntu-audio-dev/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
Every time I hit sudo apt-get update in terminal I get these errors. If they’re safe then it’s fine by me, but maybe there’s anything I need to do or check.

Thanks in advance!

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#2

Hi
Please try and run the “Fixes” from the software boutique, last icon on the right.

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#3

Everything else except “Update sources list” works. This one gives a similar error:
W:http://deb.playonlinux.com/dists/trusty/InRelease: Signature by key 74F7358425EEB6176094C884E0F72778C4676186 uses weak digest algorithm (SHA1), W:The repository 'http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., W:http://liveusb.info/multisystem/depot/dists/all/Release.gpg: Signature by key 32027DE3D67157C45E69C0AE4E940D7FDD7FB8CC uses weak digest algorithm (SHA1), E:Failed to fetch http://ppa.launchpad.net/ubuntu-audio-dev/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.

#4

Have you subscribed to welcome updates? (Welcome splash screen, top right corner)

#5

I think I have, atleast I remember pressing it and the option is not there at the moment.

#6

OK, I think you’ve installed some PPAs that are not provided through the boutique.
You can see all the boutique’s ppas here: https://paste.ubuntu.com/23181937/
See here how to remove old ppas: https://askubuntu.com/questions/307/how-can-ppas-be-removed

#7

Ouroumov hit on the answer. That ppa has not been updated for four years. No xenial release.

https://launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/ppa

https://ubuntuforums.org/showthread.php?t=2217739

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#8

I don’t want to make a new topic, but instead I’ll post my problem here. It’s again related to repositories and now whenever I want to do ‘software updater’ it gives an error: “Failed to connect to internet” despite the fact that I have internet connection. I’ve tried to change servers, but nothing helps.

When I execute sudo apt-get update I get the following errors:
N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension W: The repository 'http://ppa.launchpad.net/skunk/pepper-flash/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/skunk/pepper-flash/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.

So I understand it has something to do with Pepper-flash, which I need for Chromium. Is this the reason why it “fails to connect to internet” while updating? How can I fix it?

Thanks in advance!

#9

I run Chromium and pepper-flash from our software sources. To install to browser…

sudo apt install pepperflashplugin-nonfree

You would need to remove the current skunk ppa.

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