This brief article will provide the command needed to updated an expired apt key.
Occasionally, you will have to update your apt-key keyring with a newer package signing key from LINBIT. If you see an error similar to that in the title of this KB entry, you can run the following command (as root) to update your LINBIT package signing key:
# wget -O- https://packages.linbit.com/package-signing-pubkey.asc | apt-key add -
For RPM based distros
# rpm --import https://packages.linbit.com/package-signing-pubkey.asc
Edited 2021/02/12 - DJV