Initial Settings : Configure APT Sources2021/08/17

	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@dlp:~#

vi /etc/apt/sources.list

# comment out DVD source and add network source

deb cdrom:[Debian GNU/Linux 11.0.0 _Bullseye_ - Official amd64 DVD Binary-1 20210814-10:04]/ bullseye contrib main

deb http://deb.debian.org/debian/ bullseye main contrib

# if comment outed

# uncomment it to enable [security] source

deb http://security.debian.org/debian-security bullseye-security main contrib

# if comment outed

# uncomment it to enable [updates] source

deb http://deb.debian.org/debian/ bullseye-updates main contrib

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

root@dlp:~#

vi /etc/apt/sources.list

# add to the end

deb http://deb.debian.org/debian/ bullseye-backports main contrib

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

root@dlp:~#

apt update

Hit:1 http://deb.debian.org/debian bullseye InRelease
Hit:2 http://security.debian.org/debian-security bullseye-security InRelease
Get:3 http://deb.debian.org/debian bullseye-backports InRelease [37.0 kB]
Fetched 37.0 kB in 1s (54.0 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.

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