apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).

I am getting the following warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
What are the steps to get this resolved?
Thank you,
Howard

 

root@server1:~# sudo apt-get update
Get:1 http://dl.hhvm.com/debian jessie InRelease [2411 B]
Hit:2 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Hit:3 https://repos-droplet.digitalocean.com/apt/droplet-agent main InRelease
Hit:4 http://archive.ubuntu.com/ubuntu noble InRelease
Hit:5 http://archive.ubuntu.com/ubuntu noble-updates InRelease
Hit:7 http://archive.ubuntu.com/ubuntu noble-backports InRelease
Hit:8 http://security.ubuntu.com/ubuntu noble-security InRelease
Err:1 http://dl.hhvm.com/debian jessie InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B4112585D386EB94
Hit:10 https://deb.goaccess.io noble InRelease
Hit:11 https://ppa.launchpadcontent.net/ondrej/php/ubuntu noble InRelease
Ign:6 https://www.rhsupplyco.com/apt stable InRelease
Err:12 https://www.rhsupplyco.com/apt stable Release
404 Not Found [IP: 104.21.76.128 443]
Hit:9 https://rspamd.com/apt-stable noble InRelease
Reading package lists... Done
W: GPG error: http://dl.hhvm.com/debian jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B4112585D386EB94
E: The repository 'http://dl.hhvm.com/debian jessie 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.
E: The repository 'https://rhsupplyco.com/apt stable Release' does not have a Release file.
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.

 

This is not how you got the info message (not an error).

You did something afterwards to get it.
Probably when trying to fix the hhvm.com repository signature.

There also appears to be an issue with the rhsypplyco.com repository.

 

What OS is that? What all is added to /etc/apt/sources.list and /etc/apt/sources.list.d/* ?
My guess is some repository there has outdated repository key. If that is the case, download and install the current key from that repository.

 

I installed them by mistake. What is the best way to remove them?

 

: The repository 'https://ppa.launchpadcontent.net/gezakovacs/ppa/ubuntu noble Release' does not have a Release file.
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.
ubuntu@ubuntu:~$ sudo apt-get update
Ign:1 cdrom://Ubuntu 24.04.3 LTS _Noble Numbat_ - Release amd64 (20250805.1) noble InRelease
Hit:2 cdrom://Ubuntu 24.04.3 LTS _Noble Numbat_ - Release amd64 (20250805.1) noble Release
Hit:4 http://security.ubuntu.com/ubuntu noble-security InRelease
Hit:5 http://archive.ubuntu.com/ubuntu noble InRelease
Hit:6 http://archive.ubuntu.com/ubuntu noble-updates InRelease
Hit:7 http://archive.ubuntu.com/ubuntu noble-backports InRelease
Ign:8 https://ppa.launchpadcontent.net/gezakovacs/ppa/ubuntu noble InRelease
Err:9 https://ppa.launchpadcontent.net/gezakovacs/ppa/ubuntu noble Release
404 Not Found [IP: 185.125.190.80 443]
Reading package lists... Done
E: The repository 'https://ppa.launchpadcontent.net/gezakovacs/ppa/ubuntu noble Release' does not have a Release file.
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.
ubuntu@ubuntu:~$ sudo apt-get install unetbootin
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package unetbootin
ubuntu@ubuntu:~$

Thoughts?

 

It might be best to start again from an empty system and not install extra repositories. Especially not repositories that are not meant for Ubuntu 24.04.
If you still want to remove them, depends on how you installed the extra repositories. If you used command add-apt-repository then use the same command with --remove added.
Another way is removing the lines from /etc/apt/sources.list or the corresponding directory from /etc/apt/sources.list.d/ . But this has complications if something is already installed from those repositories. You should apt purge those installed packages first.

 

Why do you need unetbootin on an ISPConfig system? Is this an ISPConfig installation at all?
If unetbootin is supposed to come from gezakovacs/ppa, it is not installed because that repository does not have a release file and thus repository is disabled.
If you want to run ISPConfig, start from an empty system, use ISPConfig autoinstall.sh and do not add stuff that is not mentioned in the installation instructions. https://www.ispconfig.org/documentation/
Install these extra stuffs on your workstation or some other host that is not for ISPConfig.