Reference: https://www.tecmint.com/upgrade-debian-10-to-debian-11/
Hacemos upgrade y rebooteamos
apt-get update && apt-get -y upgrade; apt full-upgrade; apt --purge autoremove; systemctl reboot
Modificamos sources.list
cp -v /etc/apt/sources.list /etc/apt/source.list.old
cat >/etc/apt/sources.list <<EOF deb http://deb.debian.org/debian bullseye main contrib non-free #deb-src http://deb.debian.org/debian bullseye main contrib non-free deb http://deb.debian.org/debian bullseye-updates main contrib non-free #deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free #deb http://deb.debian.org/debian bullseye-backports main contrib non-free #deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free deb http://security.debian.org/debian-security/ bullseye-security main contrib non-free #deb-src http://security.debian.org/debian-security/ bullseye-security main contrib non-free EOF
Refrescamos listado de paquetes y rebooteamos
apt update; apt full-upgrade; apt --purge autoremove; systemctl reboot
Se supone que con eso queda pronto. Debería actualizarse NIS, NFS y SLURM y salir todo andando Ojo: mantener los archivos de configuración anteriores!!!