Package: debian-12.0.0-amd64-DVD-1.iso File: /etc/apt/source.list Severity: high (security) Bug Description : After installation of Debian 12 with the 'debian-12.0.0-amd64-DVD-1.iso' image, the '/etc/apt/source.list' file contains only one entry for installing or upgrading the system: deb cdrom:[Debian GNU/Linux 12.0.0 _Bookworm_ - Official amd64 DVD Binary-1 with firmware 20230610-10:23]/ bookworm main non-free-firmware After editing the 'source.list' file with the 'software and updates' software and activating all remote repositories of the first tab of this program, only one line is added to the 'source.list' file ': deb https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware It therefore lacks parameters to perform updates / security repertories on this DVD version of 'source.list' file, while in the Live ISO version of Debian 12 Cinnamon does not have this type of problem. Someone who doesn't know Debian and has installed the DVD edition of Debian on a machine can find themselves really embarrassed some time later since the security updates for their machine are not done without manually updating update the 'source.list' file. Thank you to correct this as soon as possible. Best regards. Philippe