Problem:
When running sudo apt update
you see the following error message:
Err:14 https://ocean.surfshark.com/debian stretch InRelease The following signatures were invalid: EXPKEYSIG 1DB7590E83C8F643 Surfshark package maintainer <[email protected]>
Solution:
Install the updated Surfshark package by pasting the following into your shell (as shown on the Surfshark help page):
curl -f https://downloads.surfshark.com/linux/debian-install.sh --output surfshark-install.sh cat surfshark-install.sh sh surfshark-install.sh
After that, the error should be fixed and you can run
sudo apt update
again.