Ceci :
# deb cdrom:[Debian GNU/Linux 10.4.0 _Buster_ - Official i386 DVD Binary-1 20200509-11:59]/ buster contrib main
# deb cdrom:[Debian GNU/Linux 10.4.0 _Buster_ - Official i386 DVD Binary-1 20200509-11:59]/ buster main contrib
deb
http://security.debian.org/debian-security/ buster/updates main contrib
deb-src
http://security.debian.org/debian-security/ buster/updates main contrib
# buster-updates, previously known as 'volatile'
# 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/ buster-updates main contrib
deb-src
http://deb.debian.org/debian/ buster-updates main contrib