Instead of the purple GRUB screen, everything I see when I try to boot is this. How to fix this?
Edit: Yes, I have multiple partitions. I recently tried to expand the size of the partition in which Ubuntu is installed (using GParted), but I cancelled the operation in the middle of the process because it was taking too long. When I tried to log in again, a message of error appeared. I then searched the web for a solution and I found a couple of terminal commands to reinstall GRUB. The result was this same screen below.
grub rescue
that usually means that it is not seeing an installation of Ubuntu or a Linux on the system. – Terrance Apr 12 '18 at 22:43