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I try to upgrade to the latest release of Ubuntu (14.04 - Alpha).

I typed this in the Terminal:

$ sudo update-manager -d

After some checks, a popup appeared:

I clicked the Upgrade... button:

Preparing to upgrade was successful, but Setting new sofware channels fails:

How can this be fixed?

kiri
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Ionică Bizău
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    This is not uncommon on alpha releases. 14.04 is very much still in development and not ready for anybody other than the developers. This question is off topic here see [There's an issue with an Alpha/Beta Release of Ubuntu, what should I do?](http://askubuntu.com/q/18641/107450). – Warren Hill Nov 19 '13 at 16:46
  • @WarrenHill Is this really a bug or I have some settings that must be fixed on my machine? – Ionică Bizău Nov 19 '13 at 16:48
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    **This is not a bug but a feature!** The [*`extras` entries from `/etc/apt/sources.list`*](http://askubuntu.com/a/379443/148451) must be removed to be able to upgrade. So, I believe that the close votes can be removed... – Ionică Bizău Nov 19 '13 at 18:25

1 Answers1

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Just disable the "extra" repositories. These packages still not have trusty counter part, since most of them are for Stable versions:

enter image description here

To disable the extras repositories, just remove all the extras entries from /etc/apt/sources.list file or use the software sources and untick the extras entries there.

sudo sed -i '/extras\.ubuntu\.com/d' /etc/apt/sources.list
Braiam
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