Disk partitions

General system Newbie
7

In the live session, open a terminal:

(copy-paste one command at a time)

1. sudo mount /dev/nvme0n1p5 /mnt 
2. sudo mount /dev/nvme0n1p1 /mnt/boot/efi
3. arch-chroot /mnt 
4. grub-install
5. grub-mkconfig -o /boot/grub/grub.cfg
6. exit

Reboot.