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Revision 108 as of 2020-10-04 03:16:26
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Comment: Simplify instructions after a new user on /r/debian expressed confusion at the steps: Replace aptitude with apt, move sloppy instructions, use "apt edit-sources", remove Iceweasel, expand section.
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 <<TableOfContents(3)>> <<TableOfContents(3)>>
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If you're setting up backports for a system that isn't running the latest version of Debian
(e.g. a <<DebianCodename(oldstable)>> system while the latest is <<DebianCodename(stable)>>)
then you will also want to add a line for the "sloppy" backports section.
Currently that is <<DebianCodename(oldstable)>>-backports-sloppy,
but after the release of <<DebianCodename(testing)>>,
you'll want to add a line for <<DebianCodename(stable)>>-backports-sloppy.
Line 45: Line 52:
(This line is available only after the release of Debian <<DebianCodename(stable)>>)

{{{deb http://deb.debian.org/debian buster-backports-sloppy main contrib non-free}}}

(This line is available only after the release of Debian <<DebianCodename(testing)>>. Using it before the release of Debian <<DebianCodename(testing)>> will cause errors!)
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Become root and open the file {{{/etc/apt/sources.list}}} in your favorite editor:
{{{
human@debian:~$ su
Password:
debian:/home/human# nano /etc/apt/sources.list}}}
Add the following lines:
As root, or using sudo, open your sources.list file (Nano is the recommended editor for new users):
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# Backports repository
deb http://deb.debian.org/debian buster-backports main contrib non-free # available after buster release
#deb http://deb.debian.org/debian buster-backports-sloppy main contrib non-free # available after bullseye release
# apt edit-sources
}}}
Append the following line to the bottom of the file:
{{{
deb http://deb.debian.org/debian buster-backports main contrib non-free
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debian:/home/human# aptitude update}}} # apt update
}}}
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If you are running Iceweasel, simply use the built-in search plugin (Deb Search).
Backported versions of packages will also appear when searching their names with the {{{apt search}}} command, or one can view all available versions of a package by running:
{{{
apt show package-name -a
}}}
Replacing {{{package-name}}} with the name of the package you wish to view.
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debian:/home/human# aptitude -t buster-backports install cockpit}}} # apt -t buster-backports install cockpit}}}
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 2. run {{{aptitude update}}}  2. run {{{apt update}}}
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  * {{{apt-get purge debian-backports-keyring}}}<<BR>>''or''   * {{{apt purge debian-backports-keyring}}}<<BR>>''or''

Translation(s): English - Deutsch - Español - Français - Italiano - Русский - 简体中文

You are running Debian stable because you prefer the stable Debian tree. It runs great, there is just one problem: The software is a little bit outdated compared to other distributions. That is where backports come in.

Backports are recompiled packages from testing (mostly) and unstable (in a few cases only, e.g. security updates), so they will run without new libraries (wherever it is possible) on a stable Debian distribution. It is recommended to pick out single backports which fit your needs, and not to use all backports available.

This article illustrates how to:

  • configure your stable system to use the Backports repository
  • find a specific backport
  • install packages from the repository
  • have your backports upgraded automatically

For official instructions on how to use Debian Backports, visit https://backports.debian.org/Instructions/.

If you want to create a non-official backport of a package you need, have a look at SimpleBackportCreation.

If you want to build a backport with the intent of sharing it with others within Debian, see the BuildingFormalBackports page.


Configuring your stable system

In the following example, we will use bullseye as the current codename for Debian Stable. Please adjust the codename accordingly if you are using a different version of Debian.

If you're setting up backports for a system that isn't running the latest version of Debian (e.g. a buster system while the latest is bullseye) then you will also want to add a line for the "sloppy" backports section. Currently that is buster-backports-sloppy, but after the release of bookworm, you'll want to add a line for bullseye-backports-sloppy.

Adding the repository

Using Synaptic

  • Open Synaptic
  • Go to "Settings -> Repositories":

backports_synaptic_1.png

  • In the following dialog box, select the tab "Third-Party Software" and click on the "Add..." button in the lower left corner:

backports_synaptic_2.png

  • Copy the repository below, then hit the "Add Source" button:

deb http://deb.debian.org/debian buster-backports main contrib non-free

backports_synaptic_3.png

  • Finally, hit the "Reload" button in Synaptic's main panel to update the repository information on your system.

Using the command line

As root, or using sudo, open your sources.list file (Nano is the recommended editor for new users):

# apt edit-sources

Append the following line to the bottom of the file:

deb http://deb.debian.org/debian buster-backports main contrib non-free

If you are a free software enthusiast, you might want to remove the contrib and non-free sections. (See Debian package management for details.)

Now that you have added the repository, update APT's cache to include the backports in the list of available packages:

# apt update

Done.

Using backports

Finding backports

There are a several different ways to find out if a backport of a certain Debian package exists. A pretty convenient one is using Debian's web-based package search (packages.debian.org).

Backported versions of packages will also appear when searching their names with the apt search command, or one can view all available versions of a package by running:

apt show package-name -a

Replacing package-name with the name of the package you wish to view.

Installing backports on the command line

The backports repository is deactivated by default. So, if you want to install a backported package, you will have to state that explicitly.

For example:

# apt -t buster-backports install cockpit

The -t option here specifies buster-backports as the target release. This would install a newer version of Cockpit and all its reverse dependencies from buster-backports instead of the older one from Debian stable release.

FAQ

Reporting bugs

Because of limitations in the Debian Bug Tracking System, any bugs relevant to backported packages still have to be reported to the debian-backports list.

Migrate from backports.org to backports.debian.org

On Sept. 5th, 2010, Backports became an official service (see announcement).

Systems configured to use backports.org should be reconfigured to use the new repository/URL (in /etc/apt/sources.list*), since backports.org service is already stopped.

  1. replace backports.org with http://deb.debian.org/debian in /etc/apt/sources.list*.

  2. run apt update

  3. remove the backports.org key from your keyring. Depending how you installed it...
    • apt purge debian-backports-keyring
      or

    • apt-key del 16BA136C

List installed backports

Out of all installed packages, which ones are backports? One way to tell is by version: all backports are tagged with ~bpo, for example, 24.5+1-6~bpo8+1, so at the command line you might say:

    dpkg-query -W | grep '~bpo'

External links


CategoryPackageManagement CategoryRelease