I use that commands in Ubuntu 15.04:

sudo add-apt-repository ppa:tualatrix/ppa
sudo apt-get update
sudo apt-get install ubuntu-tweak

When I run sudo apt-get update I get this error message:

W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/vivid/main/source/Sources  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/vivid/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/vivid/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Because of this error I can't install Ubuntu Tweak...

enter image description here

How can I solve this?

  • Please don't double post.
    – xangua
    Jul 17, 2015 at 22:31

1 Answer 1


ppa:tualatrix/ppa doesn't (currently) contain any package for Ubuntu 15.04. The warning messages in your question are normal behaviour in such a case.

As a remedy, you can

  • remove Tualatrix' PPA and use the GetDeb App repository:

    wget -q -O - http://archive.getdeb.net/getdeb-archive.key | sudo apt-key add -
    sudo sh -c 'echo "deb http://archive.getdeb.net/ubuntu vivid-getdeb apps" >> /etc/apt/sources.list.d/getdeb.list'


  • switch to the trusty packages from Tualatrix' PPA, since that seems to be the latest upstream version anyway:

    1. Open the software properties settings (gksudo software-properties-gtk, if you can't find it in the system settings overview).
    2. Select the entry for Tualatrix' PPA (binary) and click on the button titled Edit.
    3. Replace vivid with trusty and click OK.

      software source property editor

    4. Repeat step 2 and 3 with the entry for Tualatrix' PPA (source).

    5. Click Close.

In both cases you need to run sudo apt-get update to update the newly configured package sources.

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