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I've completely purged Skype from ubuntu 20.04 since I kept receiving the following error whenever apt-get update and couldn't find a solution:

Err:4 https://repo.skype.com/deb stable InRelease                        
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3
  
  Reading package lists... Done
W: GPG error: https://repo.skype.com/deb stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3
E: The repository 'https://repo.skype.com/deb stable InRelease' is not signed.

Yet, I still receive the above error when apt-get update even though I've removed the public key, all Skype installs and Snaps.

What is going on?

2 Answers 2

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SOVLED:

sudo rm /etc/apt/sources.list.d/skype-stable.list
sudo rm /etc/apt/sources.list.d/skype-stable.save
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  • Please mark this as answer for the question , So others that have the same issue can solve it too. But how can i do that ? You simply need to mark an answer as correct (the green check image).
    – AEM
    Jun 22, 2021 at 2:45
3

1F3045A5DF7587C3 key is no longer valid which can be removed using apt-key del command.

Step 1: Delete the invalid key:

sudo apt-key del 1F3045A5DF7587C3

If anyone has Skype running but facing the signature verification error while running sudo apt update command then continue with the below steps.

Step 2: Add a valid key:

curl https://repo.skype.com/data/SKYPE-GPG-KEY | sudo apt-key add -

Step 3: Run the below commands:

sudo apt update

sudo apt upgrade

This error should be removed now!

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  • I think you need to highlight on point of Running apt-get update before Step #2 as I follow the steps but did not work (Without running the update command after removing the old Key) first. Jul 11 at 14:47
  • Also, Can you mention solving the Skype expired Key instead of Removing the enter Skype program to hide the display error when running apt-get update command? his comment askubuntu.com/questions/1347366/… is correct Jul 11 at 14:57

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