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From askubuntu.com

Upgrade Ubuntu 16.04 to 18.04 fails - No Public Key

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I'm trying to upgrade Ubuntu 16.04 to 18.04 LTS using sudo do-release-upgrade and getting the following error: Checking for a new Ubuntu release Get:1 Upgrade tool signature [819 B] Get:2 Upgrade t...

#gnupg #updates #upgrade

15h ago