I am running Ubuntu from a bootable USB drive on an old machine. The graphical interface is using up all the memory and I actually just need a terminal.
Is there a way to not start the desktop environment from a live OS image?
When GRUB is loading, shortly after the BIOS finishes loading, quickly press
UEFI + Ubuntu-14.04.1-desktop-amd64
With a UEFI boot (without CSM enabled in firmware), the media boots into a GRUB menu.
When you see a graphical (not text) Ubuntu boot screen it is likely that your firmware has enabled CSM and in effect disabled UEFI boot. Go back in your firmware and re-enable the (ultra) fast boot mode.
You might want to replace the existing