Release Notes for Debian 13 (trixie)

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

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. Archive areas
  • 2.3. What's new in the distribution?
    • 2.3.1. Desktops and well known packages
    • 2.3.2. More translated man pages
    • 2.3.3. News from Debian Med Blend
    • 2.3.4. News from Debian Astro Blend
    • 2.3.5. Secure Boot on ARM64
• 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. Non-free firmware moved to its own component in the archive
    • 5.1.2. Changes to packages that set the system clock
    • 5.1.3. Puppet configuration management system upgraded to 7
    • 5.1.4. youtube-dl replaced with yt-dlp
    • 5.1.5. Fcitx versions no longer co-installable
    • 5.1.6. MariaDB package names no longer include version numbers
    • 5.1.7. Changes to system logging
    • 5.1.8. rsyslog changes affecting log analyzers such as logcheck
    • 5.1.9. rsyslog creates fewer log files
    • 5.1.10. slapd upgrade may require manual intervention
    • 5.1.11. GRUB no longer runs os-prober by default
    • 5.1.12. GNOME has reduced accessibility support for screen readers
    • 5.1.13. Baseline for 32-bit PC is now i686
    • 5.1.14. Changes to polkit configuration
    • 5.1.15. A "merged-/usr" is now required
    • 5.1.16. Unsupported upgrades from buster fail on libcrypt1
    • 5.1.17. openssh-server no longer reads ~/.pam_environment
    • 5.1.18. 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
    • 5.2.3. Python Interpreters marked externally-managed
    • 5.2.4. Limited hardware-accelerated video encoding/decoding support in VLC
    • 5.2.5. systemd-resolved has been split into a separate package
    • 5.2.6. systemd-boot has been split into a separate package
    • 5.2.7. systemd-journal-remote no longer uses GnuTLS
    • 5.2.8. Extensive changes in adduser for bookworm
    • 5.2.9. Predictable naming for Xen network interfaces
    • 5.2.10. Change in dash handling of circumflex
    • 5.2.11. netcat-openbsd supports abstract sockets
  • 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