Convert Nikon RAW images to JPG

note : P{8} Runs these conversions with 8 different processes

ls *.NEF | sed 's#.NEF##' | xargs -P8 -I^ convert ^.NEF ^.jpg
(from http://superuser.com/questions/577643/how-do-i-batch-convert-thousands-of-nefs-to-jpegs)
Clone USB pen drives with dd