---

cat << 'EOF' > /mnt/etc/apt/sources.list
deb http://old-releases.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
EOF




mkdir -p /mnt/etc/apt/sources.list.d/bak
mv /mnt/etc/apt/sources.list.d/*.list /mnt/etc/apt/sources.list.d/bak/ 2>/dev/null || true


apt-get clean
apt-get update --allow-insecure-repositories
apt-get install -y --allow-unauthenticated linux-image-generic grub-pc