Individual entries cannot be continued onto a following line. Empty lines are ignored, and a character anywhere on a line marks the remainder of that line as a comment. Consequently an entry can be disabled by commenting out the entire line. If options should be provided they are separated by spaces and all of them together are enclosed by square brackets [] included in the line after the type separated from it with a space.
If an option allows multiple values these are separated from each other with a comma ,. Individual entries are separated by an empty line; additional empty lines are ignored, and a character at the start of the line marks the entire line as a comment.
An entry can hence be disabled by commenting out each line belonging to the stanza, but it is usually easier to add the field "Enabled: no" to the stanza to disable the entry. Removing the field or setting it to yes reenables it.
Options have the same syntax as every other field: A fieldname separated by a colon : and optionally spaces from its value s. Note especially that multiple values are separated by spaces, not by commas as in the one-line format. Multivalue fields like Architectures also have Architectures-Add and Architectures-Remove to modify the default value rather than replacing it.
The distribution is generally a suite name like stable or testing or a codename like stretch or buster while component is one of main, contrib or non-free. The deb-src type references a Debian distribution's source code in the same form as the deb type.
A deb-src line is required to fetch source indexes. If this option isn't set the default is all architectures as defined by the APT::Architectures config option.
If this option isn't set the default is all languages as defined by the Acquire::Languages config option. If not specified, the default set is defined by the Acquire::IndexTargets configuration scope targets are specified by their name in the Created-By field.
Additionally, targets can be enabled or disabled by using the Identifier field as an option with a boolean value instead of using this multivalue option. The value of this option is ignored if the repository doesn't announce the availability of PDiffs. Defaults to the value of the option with the same name for a specific index file defined in the Acquire::IndexTargets scope, which itself defaults to the value of configuration option Acquire::PDiffs which defaults to yes.
See also Question: Which Flavour of Linux is freeware managed by redhat? See also Where is Java installed on Linux? Related posts: Best answer: What is source list Ubuntu? What is Debian contrib? How do I add a repository to Debian 10? Best answer: How do I add a repository to Debian? Using a graphical program Some programs allow configuring Apt sources through a graphical interface.
You can edit this files as root using your favorite text editor. See man 5 sources. Deb indicates that the archive contains binary packages deb , the pre-compiled packages that we normally use.
Deb-src indicates source packages , which are the original program sources plus the Debian control file. The main list of Debian repository mirrors is located here. If you mean to be tracking a release class then use the class name, if you want to track a Debian point release, use the code name.
Avoid using stable in your sources. These are the packages installed by default when using package managers like apt-get , aptitude , synaptic , etc The next section on the entry line is an URL of the repository from where the packages will be downloaded from. You can find the main list of Debian repositories from Debian Worldwide sources.
If you intend to track a release class then use the class name, if you want to track a Debian point release, use the code name. As we can see in the following sources. If your sources. We will go through that in the next section of the article. If you also need the Backports, contrib, and non-free components, add buster-backports lines. For example, for Debian 10 Buster:. Users of Debian 9 Stretch or older releases will need to install the apt-transport-https package first.
This will ensure your apt index is synchronized. Then you can install new packages from the repository. In some cases you can get errors with repositories while updating the package lists.
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