The following signatures couldn't be verified because the public key is not available

~# apt-get update
Hit:1 http://security.debian.org/debian-security bullseye-security InRelease
Hit:2 http://deb.debian.org/debian bullseye InRelease
Hit:3 http://deb.debian.org/debian bullseye-updates InRelease
Hit:4 http://ftp.debian.org/debian bullseye-backports InRelease
Get:5 http://repo.mysql.com/apt/debian bullseye InRelease [12.9 kB]
Err:5 http://repo.mysql.com/apt/debian bullseye InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
Fetched 12.9 kB in 1s (15.1 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repo.mysql.com/apt/debian bullseye InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
W: Failed to fetch http://repo.mysql.com/apt/debian/dists/bullseye/InRelease  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
W: Some index files failed to download. They have been ignored, or old ones used instead.
 

Musí se naimportovat nové klíče:

apt-key adv --keyserver pgp.mit.edu --recv-keys 3A79BD29

Chybová hláška:

gpg: keyserver receive failed: No keyserver available

Jedná se o problém sítě - konfigurace firewall a pod.:

Místo

pgp.mit.edu

použijte:

hkp://pgp.mit.edu:80
hkps://pgp.mit.edu
hkps://keyserver.ubuntu.com
hkp://p80.pool.sks-keyservers.net:80

apt-key adv --keyserver hkp://pgp.mit.edu:80  --recv-keys 3A79BD29

Poté:

apt-get update