Mealman1551

Debian Trixie and the New deb822 Format for APT Sources

Introduction

Since February 2025, Debian 13 (Trixie) and APT introduced the deb822 format for managing APT sources. This new format replaces the traditional /etc/apt/sources.list file with the more structured and readable /etc/apt/sources.list.d/debian.sources file.

This change was introduced by APT, starting with an update that enabled users to run:

apt modernize-sources

This command automatically converts the old sources.list format to the new deb822 format.