A copy of a CD containing e.g. installation software or a game (so called iso image) can be mounted directly from the harddrive. This might be useful to mimic a CD without inserting the CD into the (very slow and power consuming) CD/DVD-drive.
1. Create a mountpoint e.g. in the /media directory:
sudo mkdir /media/iso
2. Mount the image MyCDimage.iso as a CD:
sudo mount -t iso9660 -o loop MyCDimage.iso /media/iso
3. Display all filesystems to check its mounted:
df -h
In order to play e.g. Windows games with wine the mountpoint /media/iso has to be added as a drive under wine.
winecfg
choose the drive tab and add /media/iso
Rforge 