I received this message today from apt update
:
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://xpra.org xenial Release: The following signatures were invalid: KEYEXPIRED 1525416977 KEYEXPIRED 1525416977 KEYEXPIRED 1525416977 W: Failed to fetch https://xpra.org/dists/xenial/Release.gpg The following signatures were invalid: KEYEXPIRED 1525416977 KEYEXPIRED 1525416977 KEYEXPIRED 1525416977 W: Some index files failed to download. They have been ignored, or old ones used instead.
I tried:
sudo apt-key -d 1525416977 curl https://xpra.org/gpg.asc | sudo apt-key add -
...but still get the same message.
Duplicate of https://winswitch.org/trac/ticket/304
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1828