Small useful info. that even “Jimmy Google” knows (Information/solutions found from people by performing a Google search). I had to use this more when I was involved with game server hosting for system image cracking and modification.
losetup /dev/loop0 imagename.iso (.img, etc..)
mount /dev/loop0 /mnt
losetup -d /dev/loop0
If you’re not familiar with the losetup command, in short it sets up and controls loop devices. We use it here to associate a loop device with regular files. A loop device is a psuedo-device that makes a file accessible as a block device. You can man losetup for more usage information.