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Possible Duplicate:
How do I deal with “unauthenticated sources” errors in the Software Center?

I'm trying to install software updates but I always get this error. 

Requires installation of untrusted packages
The action would require the installation of packages from unauthenticated sources.
Details : gir1.2-mutter-3.0 gnome-tweak-tool libmutter0 mutter-common

I don't know what it's asking me to do. Please help.

Cheers.

Community
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eim
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  • Can you post the output of sudo apt-get update in your question? – cauon Oct 05 '12 at 07:59
  • Did you check this ? http://askubuntu.com/questions/85641/how-do-i-deal-with-unauthenticated-sources-errors-in-the-software-center – mac Oct 05 '12 at 08:00

2 Answers2

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This actually solved the problem:

sudo apt-get clean

cd /var/lib/apt

sudo mv lists lists.old

sudo mkdir -p lists/partial

sudo apt-get clean

sudo apt-get update

Many thanks!

I got the answer here: How do I deal with "unauthenticated sources" errors in the Software Center?

Community
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eim
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0

You can try to select a differnent mirror. Run

sudo software-properties-gtk

In the Ubuntu Software tab, Download from, select via the drop-down an other server. After this, run

sudo apt-get update

Hopefully this will resolve your issue.

cauon
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