Ubuntu – “Require Installation Of Untrusted Packages” while upgrading with the update manager

update-manager

screenshot

It didn't fixed the error. So, how do I fix my GUI update?

For every software I have to install it from command line because I got same error when install software from Ubuntu Software Center.

Best Answer

Write in a terminal: sudo apt-get update && sudo apt-get upgrade or edit Update Manager settings (try this first if you have already configured Update Manager).
Launch Update Manager and try again.

Running update through a terminal gives option whether to allow or disallow untrusted packages.

WARNING: The following packages cannot be authenticated!
  playonlinux
Install these packages without verification [y/N]?

If you trust the package source, type y.

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Ubuntu – Error with Update Manager and Software Center

A hash mismatch is usually a sign of a broken mirror, so yes, changing mirror was a good approach to take. You can try switching back in a day or two, it may be fixed.

I don't know why you are getting an error on the i18n/Index file, but that's not very important, so you can happily ignore it.

I suggest running rm /var/lib/apt/lists/partial/* /var/lib/apt/lists/*, then trying to update the lists again.

You can do the same operation with these commands:

sudo rm -rf /var/lib/apt/lists/*
sudo apt-get update

Ubuntu – The update manager say “Requires installation of untrusted packages”

Run the command directly from the terminal emulator of your choice (personally, and as an example, I use Konsole). The command is sudo apt-get upgrade ORsudo apt-get dist-upgrade. Run man apt-get for more information.

Best Answer

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Ubuntu – Error with Update Manager and Software Center

Ubuntu – The update manager say “Requires installation of untrusted packages”

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