nano /etc/apt/sources.list deb http://deb.debian.org/debian/ trixie main contrib non-free deb-src http://deb.debian.org/debian/ trixie main contrib non-free deb http://deb.debian.org/debian trixie-updates main contrib non-free deb-src http://deb.debian.org/debian trixie-updates main contrib non-free deb http://security.debian.org/debian-security trixie-security main contrib non-free deb-src http://security.debian.org/debian-security trixie-security main contrib non-free