GNU nano 5.4 /etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux 11.2.0 _Bullseye_ - Official amd64 NETINST 20211218-11:12]/ bullseye main
# deb cdrom:[Debian GNU/Linux 11.2.0 _Bullseye_ - Official amd64 NETINST 20211218-11:12]/ bullseye main
deb
http://deb.debian.org/debian/ bullseye main contrib non-free
deb-src
http://deb.debian.org/debian/ bullseye main
deb
http://security.debian.org/debian-security bullseye-security main contrib non-free
deb-src
http://security.debian.org/debian-security bullseye-security main
# bullseye-updates, to get updates before a point release is made;
# see
https://www.debian.org/doc/manuals/debi … _backportsdeb
http://deb.debian.org/debian/ bullseye-updates main contrib non-free
deb-src
http://deb.debian.org/debian/ bullseye-updates main
# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
voila ce que j'ai comme réponse