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What should we do if APT gives the warning "Missing signed-by=" or indicates the removal of the "trusted.gpg.d" key while updating our repositories?

botond published 2025/03/30, v - 10:14 time
What should we do if APT gives the warning "Missing signed-by=" or indicates the removal of the "trusted.gpg.d" key while updating our repositories? | Linuxportal
One of the basic, regularly recurring tasks of maintaining our Debian or Ubuntu-based servers and systems is updating the package repositories and installed software. I was just doing the usual update cycle on my server these days, which has been a bit behind lately, so I expected that several packages would be updated. However, the update process stopped with interesting messages that drew attention to an important change related to the management of the signing keys of the package repositories. In this article, we will look at how to deal with these problems.

How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) (page 3)

botond published 2023/01/31, k - 11:30 time
How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) (page 3) | Linux portal
Another era has come again, when our Debian 10 (Buster) server has also run out of time, and it has become a burning task to do something about this problem. In this tutorial, we will upgrade a perfect Debian 10 (Buster) server to Debian 11 (Bullseye). On this page, we review the basic system as well as our higher-level server services and make the necessary subsequent settings.

How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye)

botond published 2023/01/31, k - 11:10 time
How to upgrade our perfect server based on Debian 10 (Buster) to Debian 11 (Bullseye) | Linux portal
Another era has come again, when our Debian 10 (Buster) server has also run out of time, and it has become a burning task to do something about this problem. In this tutorial, we will upgrade a perfect Debian 10 (Buster) server to Debian 11 (Bullseye). On this page, we review the necessary tasks before the update, which we use to prepare our system for the new main version.

What to do if you update the "This must be accepted explicitly before updates for this repository can be applied. See apt-secure (8) manpage for details." do we get an error message?

botond published 2022/01/11, k - 13:22 time
What to do if you update the "This must be accepted explicitly before updates for this repository can be applied. See apt-secure (8) manpage for details." do we get an error message? | Linux portal
If there is a major change to your Debian system - so you don't just need to upgrade one or two sub-versions - you will get an error message during a smooth upgrade:
This must be accepted explicitly before updates for this repository can be applied. See apt-secure (8) manpage for details.
This troubleshooter will fix this.

What if our Sury.org repository is not updated due to a GPG signing error on our Debian server?

botond published March 2021, 03, Thu - 18:08 time
What if our Sury.org repository is not updated due to a GPG signing error on our Debian server? | Linux portal
If you are using custom PHP versions on your Debian server that are updated via the Sury.org repository, you have previously configured this repository, which was still working before, and APT upgraded the packages without any problems. However, an update may cause an error in the package manager and you may not be able to access the latest packages. We will remedy this problem in this short troubleshooter.

Download and install the Digital Prosperity Software Basic Package for free

botond published Jan. 2021, 01, 27:18 p.m. time
Free Download and Installation of Digital Prosperity Software Basic Package Linux portal
I heard it on the radio these days, and then I came across the news on the website of Magyar Nemzet, in which they wrote that a Hungarian company had compiled and made available for free a software package that includes an open source operating system and a software package that also includes free components. a web browser, word processor, spreadsheet, mailer, media player, and more. The benefits of the Digital Prosperity Software Basic Package include ease of installation, easy-to-use user programs, a high degree of customization, and a free alternative to expensive operating systems and user programs thanks to open source, free components. With the help of customized user profiles, the system adapts to the user needs of each target group (children, families, the elderly).

How to update our hold packages using the APT package manager

botond published 2020/01/31, p - 20:22 time
How to Update Retained Packages with APT Package Manager Linux Portal
When updating our packages, the APT package manager may hold some pieces. This is mostly because a particular program sometimes goes through changes that change the package dependency of the base software. In this case, you would need additional new packages, sometimes ones that require the replacement of other packages. Thus, in some cases, the normal-mode package update does not perform an update to such software, but APT leaves the matter to the user. In this brief description, let’s look at an example of how to update our packages withheld in this way.

What to do if the Debian 8 (Jessie) APT package manager throws 404 (not found) errors when upgrading

botond published 2019/03/29, p - 13:17 time
Configuring the APT package manager on Debian 8 (Jessie) after archiving the libraries Linux Portal
On March 2019, 20, Debian moved the entire Debian 7 (Wheezy) repositories and the non-LTS repositories of Debian 8 (Jessie) to archive.debian.org. For Debian 8 (Jesssie), archiving affects the jessie-updates and jessie-backports repositories, so they are no longer available in the Debian main repository, but only in the archive, and no security updates are available for them. In this tutorial we will look at how to configure the APT package manager repositories so that we can continue to upgrade our Debian 8 (Jessie) system smoothly.
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