Like anything else on linux, it’s easiest to do things from the command line. Open up a terminal window and type in the following commands
sudo mkdir /media/iso
sudo modprobe loop
sudo mount filename.iso /media/iso -t iso9660 -o loop
You should be able to navigate to the /media/iso folder and see the contents of the ISO image. If you want to unmount the iso, use the following command:
sudo umount /media/iso
Stay tuned, we’ll post a howto about using these ISO images from within the GUI.
Reference: http://www.howtogeek.com/howto/ubuntu/how-to-use-an-iso-image-on-ubuntu-linux/