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Debian Buster (10) sources.list example
written March 2, 2021 by Time Traveler
Category: SupportNote Tags: Debian; Buster; sources.list; apt; apt-get #33
So let's say your at the point that you've installed Debian onto a hard drive, and you want to get updates from the internet. Depending on the exact sequence at install, your /etc/apt/sources.list will reference the installation media. Below are some basic examples for modifying your sources.list with notes on why & what. For more details on what goes in sources.list, you can use man sources.list.
The sequence of updating sources.list is to comment out existing entries (unless you also want to use these), and then add the appropriate "new" sources. Once the files sources.list is updated and saved, you run apt-get update to query the sources and get package information. (Watch for any errors or issues during this process). Once you have performed this step, you can then check for upgrade information: apt-get upgrade. These all need to be performed as superuser (login as root or use sudo).
From then on, to check for updates you just need to run:
apt-get update[Enter]
apt-get upgrade[Enter]
The following entries for sources.list use ONLY the Debian sources (main)
deb http://deb.debian.org/debian buster main
deb-src http://deb.debian.org/debian buster main
deb http://deb.debian.org/debian-security/ buster/updates main
deb-src http://deb.debian.org/debian-security/ buster/updates main
deb http://deb.debian.org/debian buster-updates main
deb-src http://deb.debian.org/debian buster-updates main
The following entries for sources.list use Debian sources PLUS contributions and non-free options (main, contrib, non-free) This configuration may be required for certain packages and to access proprietary add-ons.
deb http://deb.debian.org/debian buster main contrib non-free
deb-src http://deb.debian.org/debian buster main contrib non-free
deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free
deb-src http://deb.debian.org/debian-security/ buster/updates main contrib non-free
deb http://deb.debian.org/debian buster-updates main contrib non-free
deb-src http://deb.debian.org/debian buster-updates main contrib non-free
This is an alternate way if you wish to specify server location (example is country code us for United States, list of available servers at debian.org)
deb http://ftp.us.debian.org/debian/ buster main contrib non-free
deb-src http://ftp.us.debian.org/debian/ buster main contrib non-free
This is an alternate entry for security (e.g. security updates only)
deb http://security.debian.org/ buster/updates main contrib non-free
deb-src http://security.debian.org/ buster/updates main contrib non-free
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