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I get the error message "requires installation of untrusted packages" every time I try to update after entering my password. There are now 55.4MB of updates. Never happened before and the updates came automatically from Ubuntu. What should I do? I use Ubuntu 12.04

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it should tell you what package is not trusted, you can always --force-yes –  TheFiddlerWins Sep 11 '13 at 20:44
    
I agree. The --force-yes command is also there for a reason :) –  TheFiddlerWins Sep 12 '13 at 14:38
    
@EliahKagan I think this is a better duplicate: Update Error: Require Installation Of Untrusted Packages. The question you posted doesn't seem to tackle if the problem is with missing gpg keys. –  Alaa Sep 12 '13 at 17:55
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marked as duplicate by Eliah Kagan, Warren Hill, user68186, guntbert, Alaa Sep 12 '13 at 17:56

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