Use: $ apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys B188E2B695BD4743 It was discussed on this list last month... https://bird.network.cz/pipermail/bird-users/2020-February/014246.html On 3/5/20 12:13 PM, Petr Boltík wrote:
Hi, please check pubkey for your debian repository. No valid pubkey found. Regards Petr
Debian 10.3 installation from https://bird.network.cz/?download&tdir=debian/
apt-key add - ..... OK ~# apt update Err:2 http://bird.network.cz/debian buster InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743 Reading package lists... Done W: GPG error: http://bird.network.cz/debian buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B188E2B695BD4743 E: The repository 'http://bird.network.cz/debian buster InRelease' is not signed.