load the live media

sudo passwd root

su root

parted -a optimal /dev/sda

* mklabel gpt
* print
* remove remaining partitions.(if there are any).
* unit mib
* mkpart primary 1 512
* name 1 boot
* set 1 boot on
* mkpart primary 512 -1
* name 2 rootfs
* print
* quit

mkfs.fat -F 32 /dev/sda1
mkfs.ext4 /dev/sda2

mount /dev/sda2 /mnt

download ubuntu base

tar xvfz ubuntu-base-*.tar.gz -C /mnt

cp /etc/resolv.conf /mnt/etc/resolv.conf

mount --types proc /proc /mnt/proc
mount --rbind /sys /mnt/sys
mount --make-rslave /mnt/sys
mount --rbind /dev /mnt/dev
mount --make-rslave /mnt/dev
test -L /dev/shm && rm /dev/shm && mkdir /dev/shm
mount --types tmpfs --options nosuid,nodev,noexec shm /dev/shm
chmod 1777 /dev/shm
chroot /mnt /bin/bash
source /etc/profile
export PS1="(chroot) ${PS1}"

mount /dev/sda2 /
mount /dev/sda1 /boot

apt update
apt install --no-install-recommends nano


nano -w /etc/kernel-img.conf
-----
do_symlinks = no
no_symlinks = yes
----

apt install --no-install-recommends grub-efi
apt install --no-install-recommends initramfs-tools
apt list | grep linux-image-5.4.0- | grep generic
apt install --no-install-recommends linux-image-5.4.0-52-generic



nano -w /etc/default/grub 			remove quiet splash
update-grub
grub-install --target=x86_64-efi --efi-directory=/boot

nano -w /etc/fstab
----
/dev/sda1 /boot vfat defaults,noatime 0 2
/dev/sda2 / ext4 noatime 0 1
----

adduser l3gi0n
addgroup l3gi0n adm
addgroup l3gi0n sudo
passwd root
exit

cd
umount -l /mnt/dev{/shm,/pts,}
umount -R /mnt
reboot