Making an iso image of a cd (Ubuntu)

To make an iso image of a cd in Ubuntu Gutsy, put the cd in the drive. Open up a terminal
and cd to the directory where you want the iso image to be copied to on your hard drive.

Then type:
dd if=/dev/cdrom of=cd.iso # for cdrom

This will create an iso image called "cd.iso" in your current directory.

For a DVD just type:
dd if=/dev/dvd of=dvd.iso