tyring to make kali usb persistence and having some problems with step 2. heres my input:
root@kali:~# end=50gb
root@kali:~# read start _ < <(du -bcm kali-linux-2016.2-amd64.iso | tail -1); echo $start parted /dev/sdb mkpart primary $start $end

and my output:
du: cannot access 'kali-linux-2016.2-amd64.iso': No such file or directory
0 parted /dev/sdb mkpart primary 0 50gb