The /etc/apt/sources.list file is a configuration file used in the Debian Linux distributions. It specifies the software repositories from which the APT (Advanced Package Tool) package manager should fetch software packages and updates. This file is essential for managing software installation, updates, and upgrades on a Linux system.
Run this following by copy-paste the following (account: root):
# ROOT
[ -f /etc/apt/sources.list ] && cp /etc/apt/sources.list /etc/apt/zOLDsources.list
cat > /etc/apt/sources.list <<< "
# Fri 16 Jun 2023 09:00
deb https://deb.debian.org/debian/ bookworm main contrib non-free non-free-firmware
deb https://deb.debian.org/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://deb.debian.org/debian/ bookworm-proposed-updates main contrib non-free non-free-firmware
deb https://deb.debian.org/debian/ bookworm-backports main contrib non-free non-free-firmware
deb https://security.debian.org/ bookworm-security main contrib non-free non-free-firmware
"
# UPDATE - UPGRADE - AUTOREMOVE
apt update && apt upgrade -y && apt full-upgrade -y && apt --purge autoremove -y