The image file (dd, iso, etc) can be mounted using the loop device. You will need to know the type of filesystem the image uses.
Most Linux/Unix-based OS's have an application that will help you identify the filesystem type. Debian includes the command /lib/udev/vol_id, SUSE has the same command but in a different location (/sbin/vol_id). If you know how to get this information on a SUN box, please leave a comment for us.
If you don't have a command that will tell you the filesystem type, you can guess. Most images downloaded from the Internet will be iso9660, Windows filesystems are normally ntfs, Linux are commonly ext2, and Macintosh are udf or hfs.
As a last resort, you can work your way down the list of filesystem types listed in the mount man pages.
After you know the filesystem type, you are ready to mount.
Note: replace <_type>
To mount the file livebootcd.iso with write enabled:
To mount an image made from a Windows partition in read-only mode:
mount -t ntfs -o loop,ro,umask=0222 ./evidence.dd /mnt
Post provided by Mary M. Chaddock