i was away and my server had some updates to do. i
apt update && apt upgrade and my machine froze at ssh.
when i got home it was completely frozen so I rebooted it.
i booted into grub and was able to recover with
set root=(hd0,gpt2) linux /boot/vmlinuz-4.15.0-39-generic root=/dev/sda2 initrd /boot/initrd.img-4.15.0-39-generic
however upon the next reboot i'm back at grub. i've tried
sudo update-grub after i boot in but still the same issue
2nd question - I know how to find what the root is (just ls to you find it) from grub, however I just had to guess what my /dev/sdaX was... is there an easy way to find out from grub?