PPA for Debian doesn't work due to key change issues.

[k9io]

Debian and I assume Ubuntu have changed the way there keys storage. When I follow instructions I get the follow errors:

The following signatures were invalid: EXPKEYSIG 1BEDBB2BFF0044F2 Quadrant Information Security [email protected]
Reading package lists... Done
W: https://quadrantsec.github.io/ppa/debian/./InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: GPG error: https://quadrantsec.github.io/ppa/debian ./ InRelease: The following signatures were invalid: EXPKEYSIG 1BEDBB2BFF0044F2 Quadrant Information Security [email protected]
E: The repository 'https://quadrantsec.github.io/ppa/debian ./ InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@Test-Box:~# cat /etc/apt/sources.list.d/quadrantsec.list^C

Key storage moved to /usr/share/keyrings:

Instead of the client running "apt-key", this seemed to work for me and my testing:

curl -SsL http://download.k9.io/k9-ssh/KEY.gpg | gpg --dearmour -o /usr/share/keyrings/k9-ssh.gpg

Then I could cleanly apt-get. I also followed this: https://assafmo.github.io/2019/05/02/ppa-repo-hosted-on-github.html

[k9io]

This is Champ BTW. :)