Error with Installing Updates in Ubuntu

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I used Lenovo IdeaPad Y560. I dual boot Windows 7 and Ubuntu with it and I always make sure that my system is up-to-date either with Windows or Ubuntu. When done with installing updates in Windows, I switch to Ubuntu and run the Update Manager but when I downloaded and tried to install the updates; I got the following error message.

What should I do with it?

Requires installation of untrusted packages The action would require the installation of packages  from not authenticated sources.

Requires installation of untrusted packages

The action would require the installation of packages

from not authenticated sources.

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Answered By 0 points N/A #125490

Error with Installing Updates in Ubuntu

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Dear Larry Bailey,

According to the error message, it seems that you are missing some GPG keys. In order to fix it, open a terminal Applications > Accessories > Terminal and run this command: sudo apt-get update. You'll get some error messages, keep track of the keys after the 'NO_PUBKEY' word, as those are your missing keys. To install the missing public keys use the following command for each missing key: sudo apt-key Adv –recv-key — keyserver keyserver.ubuntu.com <missed key number>

Then update your package repository with the missing keys using this command: sudo apt-get update

Now, try to update your system again and hopefully it will run successfully this time.

Hope this may help you.

Best of luck.

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