- Server operating system version
- Debian 10.13
- Plesk version and microupdate number
- 18.0.68 Update #2
Hi there
this:
Does somebody know how to solve it? That 'apt-key adv --keyserver keyring.debian.org --recv-keys ...' thing does not seem to work in my case...
Thank you very much for your feedback(s)

this:
Code:
Hit:1 http://ftp.debian.org/debian buster InRelease
Hit:2 http://ftp.debian.org/debian buster-updates InRelease
Hit:3 http://security.debian.org buster/updates InRelease
Hit:4 http://autoinstall.plesk.com/WATCHDOG_3.1.0 buster InRelease
Hit:5 http://autoinstall.plesk.com/pool/PSA_18.0.68_16616 buster InRelease
Hit:6 http://autoinstall.plesk.com/pool/PHP_7.1.33_98 buster InRelease
Hit:7 http://autoinstall.plesk.com/pool/PHP_7.2.34_151 buster InRelease
Hit:8 http://autoinstall.plesk.com/pool/PHP_7.3.33_248 buster InRelease
Hit:9 http://autoinstall.plesk.com/PHP74_17 buster InRelease
Hit:10 https://autoinstall.plesk.com/grafana/deb stable InRelease
Hit:11 http://autoinstall.plesk.com/PHP80_17 buster InRelease
Hit:12 http://autoinstall.plesk.com/PHP81_17 buster InRelease
Hit:13 http://autoinstall.plesk.com/PHP82_17 buster InRelease
Hit:14 http://autoinstall.plesk.com/PHP83_17 buster InRelease
Hit:15 http://updates.atomicorp.com/channels/tortix-common/debian buster InRelease
Err:12 http://autoinstall.plesk.com/PHP81_17 buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
Err:13 http://autoinstall.plesk.com/PHP82_17 buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
Err:14 http://autoinstall.plesk.com/PHP83_17 buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
Reading package lists... Done
Building dependency tree
Reading state information... Done
81 packages can be upgraded. Run 'apt list --upgradable' to see them.
N: Ignoring file 'php.list.old' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
N: Ignoring file 'tor.list.old' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP81_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP82_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://autoinstall.plesk.com/PHP83_17 buster InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: Failed to fetch http://autoinstall.plesk.com/PHP81_17/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: Failed to fetch http://autoinstall.plesk.com/PHP82_17/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: Failed to fetch http://autoinstall.plesk.com/PHP83_17/dists/buster/InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E9299045CE550E57
W: Some index files failed to download. They have been ignored, or old ones used instead.
Does somebody know how to solve it? That 'apt-key adv --keyserver keyring.debian.org --recv-keys ...' thing does not seem to work in my case...
Thank you very much for your feedback(s)