Originally Posted by RobbieThe1st

When I try this I get:

Code:

robbiethe1st@rb-lt-new /Data/n900 $ sudo mount -t ubifs -o loop ./20100721-backup-rootfs.img /media/rootfsmnt/
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

What did I do wrong?