root@planchet:/home/ozzloy/Downloads# ls /dev/sd*
/dev/sda  /dev/sda1  /dev/sda2  /dev/sda5  /dev/sdb  /dev/sdc
root@planchet:/home/ozzloy/Downloads# xz -cd ./ubuntu-12.04-armhf-minfs-3.8.13-bone18.img.xz > /dev/sdc
-su: /dev/sdc: No medium found