How to fix software update error in ubuntu 12.04 LTS

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Hello,

I have been using VLC on Ubuntu for some time now. Recently I saw that the program is becoming slow to load files and that is why I thought of updating it. I got the online updates from the official website and tried to do the update but I ran into the error below. So I thought that since update is not working, I could leave it the way it was. The next time I turned on my computer the same error showed up. What could be the remedy for this?

Error: Requires Installation of untrusted packages. This action would require the installation of packages from not authenticated sources. Libvlc5 libvlccore5 vlc vlc-data vlc-nox vlc-plugin-notify vlc-plugin-pulse

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Best Answer by Queen Noman
Answered By 0 points N/A #183469

How to fix software update error in ubuntu 12.04 LTS

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Hello Dustin,

 

To correct this problem you must change back the software source.To do that:

1. Go to System

2. Select Administration

3. Then Software Sources.

4. Change the "Download from" option to "Main Server"

 

Another probable solution is this:

Open a Terminal and execute these commands ONE BY ONE.

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

 

I hope it helped.

Regards,

Osborne Percival

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Best Answer
Answered By 0 points N/A #183470

How to fix software update error in ubuntu 12.04 LTS

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Hi.

Open Gedit as root and check your repository lists. To to so in terminal type sudo gedit and press enter. Gedit will jump up and now go to Open and navigate to File system, etc, apt and open sources.list.

Check for additional repositories like Chrome repository. Maybe some of them don`t have GPG signed keys on your system and that causes the error. Also if you have many ppa and backports, remove them. They can cause system usability. Restore to default Trusted software providers in Authentication tab of Update Manager settings and run apt-get update to revert source.list. Now you can update Ubuntu.

Queen Norman

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