Release Notes for Debian 13 (trixie)

The Debian Documentation Project <https://www.debian.org/doc>.

Last updated on: 2025-03-23

This document is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2, as published by the Free Software Foundation.

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The license text can also be found at https://www.gnu.org/licenses/gpl-2.0.html and /usr/share/common-licenses/GPL-2 on Debian systems.

• 1. Introduction
  • 1.1. Reporting bugs on this document
  • 1.2. Contributing upgrade reports
  • 1.3. Sources for this document
• 2. What's new in Debian 13
  • 2.1. Supported architectures
  • 2.2. What's new in the distribution?
    • 2.2.1. Official support for riscv64
    • 2.2.2. Desktops and well known packages
• 3. Installation System
  • 3.1. What's new in the installation system?
  • 3.2. Cloud installations
  • 3.3. Container and Virtual Machine images
• 4. Upgrades from Debian 12 (bookworm)
  • 4.1. Preparing for the upgrade
    • 4.1.1. Back up any data or configuration information
    • 4.1.2. Inform users in advance
    • 4.1.3. Prepare for downtime on services
    • 4.1.4. Prepare for recovery
    • 4.1.5. Prepare a safe environment for the upgrade
  • 4.2. Start from "pure" Debian
    • 4.2.1. Upgrade to Debian 12 (bookworm)
    • 4.2.2. Upgrade to latest point release
    • 4.2.3. Debian Backports
    • 4.2.4. Prepare the package database
    • 4.2.5. Remove obsolete packages
    • 4.2.6. Remove non-Debian packages
    • 4.2.7. Clean up leftover configuration files
    • 4.2.8. The non-free and non-free-firmware components
    • 4.2.9. The proposed-updates section
    • 4.2.10. Unofficial sources
    • 4.2.11. Disabling APT pinning
    • 4.2.12. Check gpgv is installed
    • 4.2.13. Check package status
  • 4.3. Preparing APT source-list files
    • 4.3.1. Adding APT Internet sources
    • 4.3.2. Adding APT sources for a local mirror
    • 4.3.3. Adding APT sources from optical media
  • 4.4. Upgrading packages
    • 4.4.1. Recording the session
    • 4.4.2. Updating the package list
    • 4.4.3. Make sure you have sufficient space for the upgrade
    • 4.4.4. Stop monitoring systems
    • 4.4.5. Minimal system upgrade
    • 4.4.6. Upgrading the system
  • 4.5. Possible issues during upgrade
    • 4.5.1. Full-upgrade fails with "Could not perform immediate configuration"
    • 4.5.2. Expected removals
    • 4.5.3. Conflicts or Pre-Depends loops
    • 4.5.4. File conflicts
    • 4.5.5. Configuration changes
    • 4.5.6. Change of session to console
  • 4.6. Upgrading your kernel and related packages
    • 4.6.1. Installing a kernel metapackage
  • 4.7. Preparing for the next release
    • 4.7.1. Purging removed packages
  • 4.8. Obsolete packages
    • 4.8.1. Transitional dummy packages
• 5. Issues to be aware of for trixie
  • 5.1. Upgrade specific items for trixie
    • 5.1.1. openssh-server no longer reads ~/.pam_environment
    • 5.1.2. OpenSSH no longer supports DSA keys
  • 5.2. Things to do post upgrade before rebooting
    • 5.2.1. Items not limited to the upgrade process
    • 5.2.2. Limitations in security support
  • 5.3. Obsolescence and deprecation
    • 5.3.1. Noteworthy obsolete packages
    • 5.3.2. Deprecated components for trixie
  • 5.4. Known severe bugs
• 6. More information on Debian
  • 6.1. Further reading
  • 6.2. Getting help
    • 6.2.1. Mailing lists
    • 6.2.2. Internet Relay Chat
  • 6.3. Reporting bugs
  • 6.4. Contributing to Debian
• 7. Managing your bookworm system before the upgrade
  • 7.1. Upgrading your bookworm system
  • 7.2. Checking your APT source-list files
  • 7.3. Performing the upgrade to latest bookworm release
  • 7.4. Removing obsolete configuration files
• 8. Contributors to the Release Notes