These specialized commands are used to create additional mountpoints
before mounting filesystems. They are only used where you want to
mount several unrelated or read-only filesystems together, and need
additional care to use correctly.
Here is how to use these calls to unpack the "Russian doll" nest
of a Fedora 11 live CD:
add-ro Fedora-11-i686-Live.iso
run
mkmountpoint /cd
mkmountpoint /squash
mkmountpoint /ext3
mount /dev/sda /cd
mount-loop /cd/LiveOS/squashfs.img /squash
mount-loop /squash/LiveOS/ext3fs.img /ext3
The inner filesystem is now unpacked under the /ext3 mountpoint.