Did something expire that should not have?
I am using debug symbols on my Ubuntu 20.10 install, and now I get this when I run the apt-get update command.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used.
GPG error: groovy Release: The following signatures were invalid:
EXPKEYSIG C8CAB6595FDFF622 Ubuntu Debug Symbol Archive Automatic Signing Key (2016) <> 1 2 Answers
This is a current bug, see here for info and workaround:
Quoting from the above post, run:
0$ sudo wget -O- | sudo apt-key add - $ sudo apt update
You have to follow the precisely.
You probably missed the following step:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F2EDC64DC5AEE1F6B9C621F0C8CAB6595FDFF622Then run sudo apt update.