After the installation of Debian 12,11 on a Virtualized Infrastructure or a physical machine you’ll notice APT repositories are not configured correctly. These issue doesn’t apply to Cloud images which have repositories for Debian configured correctly. In this guide we will show you how to add Debian Official repositories to sources list.
If you attempt APT repository update you’ll get an error:
The remedy to this problem is correctly updating sources.list file with Debian default update and security repositories.
Current file contents:
$ cat /etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux 11.0.0 _Bullseye_ - Official amd64 DVD Binary-1 20210814-10:04]/ bullseye contrib main
deb cdrom:[Debian GNU/Linux 11.0.0 _Bullseye_ - Official amd64 DVD Binary-1 20210814-10:04]/ bullseye contrib main
deb http://security.debian.org/debian-security bullseye-security main contrib
deb-src http://security.debian.org/debian-security bullseye-security main contrib
# bullseye-updates, to get updates before a point release is made;
# see https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_updates_and_backports
# A network mirror was not selected during install. The following entries
# are provided as examples, but you should amend them as appropriate
# for your mirror of choice.
#
# deb http://deb.debian.org/debian/ bullseye-updates main contrib
# deb-src http://deb.debian.org/debian/ bullseye-updates main contribAdd Debian Official repositories to sources list
Run the commands below to add Debian Official repositories to sources.list
- Debian 11
tee /etc/apt/sources.list<<EOF
deb http://deb.debian.org/debian bullseye main contrib non-free
# deb-src http://deb.debian.org/debian bullseye main contrib non-free
deb http://deb.debian.org/debian bullseye-updates main contrib non-free
# deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free
# deb http://deb.debian.org/debian bullseye-backports main contrib non-free
# deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
# deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free
EOF- Debian 12
tee /etc/apt/sources.list<<EOF
deb http://deb.debian.org/debian bookworm main contrib non-free-firmware
# deb-src http://deb.debian.org/debian bookworm main contrib non-free-firmware
deb http://deb.debian.org/debian bookworm-updates main contrib non-free-firmware
# deb-src http://deb.debian.org/debian bookworm-updates main contrib non-free-firmware
# deb http://deb.debian.org/debian bookworm-backports main contrib non-free-firmware
# deb-src http://deb.debian.org/debian bookworm-backports main contrib non-free-firmware
deb http://security.debian.org/debian-security bookworm-security main contrib non-free-firmware
# deb-src http://security.debian.org/debian-security bookworm-security main contrib non-free-firmware
EOFWhen done, update your APT index to confirm the repositories are working correctly:
$ sudo apt update
Get:1 http://deb.debian.org/debian bullseye InRelease [113 kB]
Get:2 http://security.debian.org/debian-security bullseye-security InRelease [44.1 kB]
Get:3 http://deb.debian.org/debian bullseye-updates InRelease [36.8 kB]
Get:4 http://deb.debian.org/debian bullseye-backports InRelease [40.9 kB]
Get:5 http://security.debian.org/debian-security bullseye-security/main Sources [15.8 kB]
Get:6 http://security.debian.org/debian-security bullseye-security/main amd64 Packages [31.1 kB]
Get:7 http://security.debian.org/debian-security bullseye-security/main Translation-en [16.8 kB]
Get:8 http://deb.debian.org/debian bullseye/main Sources [8612 kB]
Get:9 http://deb.debian.org/debian bullseye/main amd64 Packages [8178 kB]
Get:10 http://deb.debian.org/debian bullseye/main Translation-en [6241 kB]
Get:11 http://deb.debian.org/debian bullseye-backports/main Sources [49.8 kB]
Get:12 http://deb.debian.org/debian bullseye-backports/main amd64 Packages [68.7 kB]
Get:13 http://deb.debian.org/debian bullseye-backports/main Translation-en [50.5 kB]
Fetched 23.5 MB in 5s (4978 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
3 packages can be upgraded. Run 'apt list --upgradable' to see them.Update System
With the official OS repositories added and confirmed to be working let’s update the system packages:
sudo apt upgradeYou can also try distribution minor upgrades if available
sudo apt dist-upgradeAlso install common OS administration tools
sudo apt install git curl bash-completion wget curl vim telnet -yYou now have correct sources.list file on your Debian system. Below are more articles you can read on Debian Linux system:
