cipher@cipher:~$ ls *.img
from-sd-card.img  ubuntu-mate-15.04-desktop-armhf-raspberry-pi-2.img
cipher@cipher:~$ sudo ddrescue -d -D --force ubuntu-mate-15.04-desktop-armhf-raspberry-pi-2.img /dev/sdb1 
[sudo] password for cipher: 
ddrescue: Can't open input file: Invalid argument