This is a step by step guide shows how to set the priority of certain packages, launchpad PPAs, and/or other apt repositories in Ubuntu, Debian, Linux Mint, and their based systems.

Besides using the default system repositories, we can also install additional packages from third-party or software’s own repositories.

For example, user may update LibreOffice office suite via the Ubuntu PPA, install Spotify, Google Chrome, Edge from their own repositories, or install tons of media apps from deb multimedia repository in Debian.

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This tutorial shows how to disable “Ubuntu Pro” security updates in both apt command output and Software Updater dialog in Ubuntu 24.04 LTS.

Ubuntu Pro is a comprehensive subscription for Extended Security Maintenance (esm in short), which also enables another 5-year support for Ubuntu LTS releases. And, it’s free for personal and small-scale commercial use on up to 5 machines.

In all current Ubuntu LTS releases, the apt upgrade command and “Software Updater” display the Ubuntu Pro updates, which is quite annoying. Rather than enable Ubuntu Pro, here’s how to get rid of the ads step by step.

Ubuntu Pro updates in Software Updater and terminal

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Got weak signature key warning in apt command output? Here’s why, and how to get rid of it in Ubuntu 24.04.

After adding PPAs or third-party source repositories in Ubuntu 24.04, you may get following similar warning in apt command (usually apt update) output:

W: https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/dists/noble/InRelease: Signature by key 0AB215679C571D1C8325275B9BDB3D89CE49EC21 uses weak algorithm (rsa1024)

The warning may also happen in Debian and its based systems with apt package manager 2.7.13 or higher.

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