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After running these commands from the command line:

sudo apt-get update
sudo apt-get dist-upgrade
sudo do-release-upgrade -d

I get the following error message:

W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/main/source/Sources 404 Not Found,
E:Some index files failed to download. They have been ignored, or old ones used instead.

How can I fix this bug?

Eric Carvalho
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Stanley Hlatshwayo
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  • which version of 12.04? as support for 12.04.(1-3) has ended – sbergeron Aug 18 '14 at 16:32
  • The error mentions oneiric. Are you upgrading from 11.04? – muru Aug 18 '14 at 18:34
  • I bought a dell installed with ubuntu 11.04. Then i upgraded to 12.04 lts. http://extras.ubuntu.com/ubuntu/dists/oneiric/main/source/Sources is the error message after running sudo do-release-upgrade – Stanley Hlatshwayo Aug 18 '14 at 19:54
  • @sbergeron Is that significant to this situation, though? On an installed system, point releases correspond to package upgrades. Even a 12.04 system installed from a pre-12.04.1 ISO will upgrade (automatically) to the latest point release when updates are installed. The update and dist-upgrade actions should achieve this if it hasn't already happened, and they're being run before the do-release-upgrade command. Stanley Hlatshwayo: I recommend editing your question to include the complete output of cat /etc/apt/sources.list (copy, paste, select, Ctrl+K to make it look right). – Eliah Kagan Aug 19 '14 at 01:20
  • @EliahKagan ## Uncomment the following two lines to add software from Ubuntu's

    'extras' repository.

    This software is not part of Ubuntu, but is offered by third-party

    developers who want to ship their latest software.

    deb http://extras.ubuntu.com/ubuntu oneiric main deb-src http://extras.ubuntu.com/ubuntu oneiric main

     – Stanley Hlatshwayo Aug 19 '14 at 04:56
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    @StanleyHlatshwayo Please edit your question* itself* to include the output of cat /etc/apt/sources.list. It is not appearing correctly as a comment. In particular, it looks like most of it may not have fit into the comment. – Eliah Kagan Aug 19 '14 at 10:25

2 Answers2

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First, try to disable any software sources added manually, as this is probably the source of your error message.
See the following link for more details:
How can I fix a 404 Error when using a PPA or updating my package lists?

If this doesn't work, you can try the following commands to rebuild the cache (As suggested in the link below).

cd /var/lib/apt
sudo mv lists lists.old
sudo mkdir -p lists/partial
sudo apt-get update

Cannot upgrade from 12.04LTS to 14.04

Also, unless you want to try to install the latest devel. version, I would suggest you to drop the "-d" and simply run sudo do-release-upgrade.

Community
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yaron160
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  • Open Software & Updates, e.g. via the Dash.
  • Select the Other Software tab.
  • Uncheck the Independent item.
Gunnar Hjalmarsson
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