Preparation, and knowing how to restore GRUB, can save you from an unbootable system. Here's a couple tips on recovery, and how to chroot into your broken system to restore GRUB.

Commands to chroot
sudo mount /dev/(DEVICE HERE) /mnt
sudo mount bind /proc /mnt/proc
sudo mount bind /dev /mnt/dev
sudo mount bind /sys /mnt/sys
ALSO don't forget to mount your BOOT EFI partition if you have a UEFI System

finally to get internet working (I made a typo in the video, there no 'e' in resolv):

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


Links:
TimeShift video :    • Backup Linux with TIMESHIFT  
Recovery with TimeShift :    • How I fixed my bootloader & restored ...  
Gparted Live : https://gparted.org/livecd.php
Archbased Distros : https://wiki.archlinux.org/index.php/...

Patreon support :   / doriandotslash  
Music by MrGamer (@AndreasRohdin):   / gamermachine