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Recently I got lots of GPG errors and tried the following methods at various stages:

  1. sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3E5C1192 
    
  2. sudo apt-get install -reinstall ubuntu-extras-keyring 
    

    (For Ubuntu Extras only)

  3. gpg –keyserver keyserver.ubuntu.com –recv 3E5C1192
    gpg –export –armor 3E5C1192 | sudo apt-key add -
    sudo apt-get update
    
  4. sudo aptitude -o Acquire::http::No-Cache=True -o Acquire::BrokenProxy=true update`  
    
  5. sudo -i   
    apt-get clean
    cd /var/lib/apt 
    mv lists lists.old
    mkdir -p lists/partial  
    apt-get clean 
    apt-get update 
    

I again got BADSIG error for extras.ubuntu.com today. So, I'm really at a loss what's causing this error to occur time and again. I really want to solve this problem once and for all.

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marked as duplicate by Luis Alvarado Mar 14 '13 at 15:11

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Post the output of sudo apt-get update so that we can help you. –  karthick87 Dec 19 '10 at 4:09
    
Sadly I now get even more errors for my manually added repositories. Here's the output of my sudo apt-get update: paste.ubuntu.com/545647. I'd really appreciate any help on this. –  Pawan Neupane Dec 19 '10 at 16:07
    
I think I should also let you know that the errors surfaced after I downloaded all the installed packages to my cache for creating an APTonCD. I'm not sure if it's because of that, though. –  Pawan Neupane Dec 19 '10 at 18:13
    
Please confirm: Which Ubuntu version, and what repository (country)? –  david6 Jul 29 '12 at 3:42
1  
Method 5 works for me. –  david6 Jul 31 '12 at 8:18
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1 Answer 1

You can automatically import all missing GPG keys using:

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt-get update
sudo apt-get install launchpad-getkeys
sudo launchpad-getkeys
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@Pawan, is your question answered? –  Ilias el Matani Feb 14 '11 at 10:25
1  
What level of trust can be assumed for a third-party 'PPA' for keys? –  david6 Jul 29 '12 at 3:34
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