There are lots of times where you’d want to mount a CD/DVD image. Say your friend who uses his Windows box has given you a .iso file or a .mds/mdf file, created using Alcohol 120%. How would you mount them in Linux? Using the Terminal and making use of the loop device,there is no need for any external software tools and utlities. Here’s the steps: Open the Terminal/Console. Switch to root user(mounting more often than not requires root privileges, we’ll have a look as to how make media user-mountable later) by typing su root *buntu users and others distros in which the root account is disabled, can skip this step.