Have seen many people having problem with an error after booting ubuntu
error: no such partition.
Entering rescue mode...
grub rescue>
And most people not able to find a solution for this, I decide to write a guide on how to... how I solved this problem
Here we go, let's start.
Click other
click download
choose the ubuntu iso file and open
Now you have to select the usb at bottom and select
make startup disk
yes
wait for disk to install on usb
then plugin the usb in the pc where you getting the grub rescue
and restart the pc
job done, problem solved