For example, you have an .iso file, but don't want to burn it yet. You just want to see its contents.
Create a directory where you will view the iso:
mkdir /media/myisoThen mount it:
mount -t iso9660 -o loop image.iso /media/myisoThe iso I used had spaces in the filename, so I just used
mount -t iso9660 -o loop "my image.iso" /media/myiso(which works.)