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apt-key expired, gui upgrade does not work any more

Asked by SoloTurn

if an apt-key expires, update manager ceases to work on ubuntu-12.04, resp it does not display any reasonable option, nor error message. is this a bug, or "feature" ?

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Thomas Krüger
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Best Thomas Krüger (thkrueger) said : 		#1

The update manager runs privileged and can update packages that have been installed previously.
If the key of a package is not valid, it will not do so, for security reason.
You still have the option to use synaptics or the command line to update. They will prompt you about the invalid key.

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actionparsnip (andrew-woodhead666) said : 		#2

Can you give the output of:

sudo apt-get update

Thanks

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SoloTurn (soloturn) said : 		#3

Thanks Thomas Krüger, that solved my question.