Can't develop permission to edit menu.lst
From the Ubuntu terminal (as root) I am trying to edit /boot/grub/menu.lst.
When I finish editing, I get the same message re: permission to change a read-only file.
I have tried sudo and su but the permission is still required.
Can someone give me a step-by-step approach to changing to file characteristic, editing the file, and returning it to grub as edited so that it comes up at boot?