Initial Settings : Configure APT Sources2025/08/11

	Configure APT Sources that are used when running [apt] command.
[1]	If you installed Debian from DVD media, DVD was set as main source, however if it's not necessary anymore, change APT source settings.

root@localhost:~#

vi /etc/apt/sources.list

# comment out DVD source and add network source

deb cdrom:[Debian GNU/Linux 13.0.0 _Trixie_ - Official amd64 DVD Binary-1 with firmware 20250809-11:21]/ trixie contrib main non-free-firmware

deb http://deb.debian.org/debian/ trixie main non-free-firmware

# if comment outed
# uncomment it to enable [security] source

deb http://security.debian.org/debian-security trixie-security main non-free-firmware

# if comment outed
# uncomment it to enable [updates] source

deb http://deb.debian.org/debian/ trixie-updates main non-free-firmware

[2]	Add Backports source. ⇒ https://backports.debian.org/Instructions/

root@localhost:~#

vi /etc/apt/sources.list

# add to last line

deb http://deb.debian.org/debian/ trixie-backports main non-free-firmware

[3]	After changing APT source settings, update source lists.

root@localhost:~#

apt update

Get:1 http://deb.debian.org/debian trixie InRelease [138 kB]
Get:2 http://deb.debian.org/debian trixie-updates InRelease [47.1 kB]
Get:3 http://deb.debian.org/debian trixie-backports InRelease [53.3 kB]
Get:4 http://deb.debian.org/debian trixie/main amd64 Packages [9,668 kB]
Get:5 http://security.debian.org/debian-security trixie-security InRelease [43.4 kB]
Get:6 http://deb.debian.org/debian trixie/main Translation-en [6,484 kB]
Get:7 http://security.debian.org/debian-security trixie-security/main amd64 Packages [5,304 B]
Get:8 http://security.debian.org/debian-security trixie-security/main Translation-en [6,724 B]
Get:9 http://deb.debian.org/debian trixie/non-free-firmware amd64 Packages [6,868 B]
Get:10 http://deb.debian.org/debian trixie/non-free-firmware Translation-en [4,704 B]
Get:11 http://deb.debian.org/debian trixie-updates/main amd64 Packages [2,432 B]
Get:12 http://deb.debian.org/debian trixie-updates/main Translation-en [396 B]
Fetched 16.5 MB in 2s (9,239 kB/s)
All packages are up to date.

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