For more information about Python regular expressions, see

The following matches packages like xen-system-amd64, xen-utils-4.1, the $, 'libc6' would match all of them. Use $ to explicitely define the end of a package name. The following matches all packages starting with linux. Python regular expressions, matching packages to exclude from upgrading To configure unattended-upgrades, edit /etc/apt//50unattended-upgrades and adjust the following to fit your needs: Unattended-Upgrade::Allowed-Origins -backports' First, install the package by entering the following in a terminal: sudo apt install unattended-upgrades The unattended-upgrades package can be used to automatically install updated packages and can be configured to update all packages or just install security updates. If you want to understand it and tweak, then keep reading.

If you just want to do it, scroll down to the end and copy paste the two configuration file configs and you’re done. This tutorial is based on the following official Ubuntu Documentation article: Ubuntu Server Guide » Package Management » Automatic Updates. This guide explains how to configure automatic updates in Ubuntu Server 20.04.

Ubuntu calibre server update