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How to fix apt error: NO_PUBKEY 1F3045A5DF7587C3

Problem:

When running apt update, you see the following error message:

example.txt
Err:14 https://repo.skype.com/deb stable InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1F3045A5DF7587C3

Solution

This error occurs due to the Skype repo using the outdated (as of April 2022) apt-key method of importing keys.

You can import the key using the following commands:

example.sh
wget -qO- https://repo.skype.com/data/SKYPE-GPG-KEY | gpg --dearmor | sudo tee /usr/share/keyrings/skype-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/skype-archive-keyring.gpg] https://repo.skype.com/deb stable main" > /etc/apt/sources.list.d/skype-stable.list

and then running

example.sh
apt update

again.

 

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