update wallpaper kindle

#!/bin/bash
if [ $# != "1" ]
    then
    echo "First argument should be device location (e.g. /dev/sdb1)"
    exit
fi
sudo mount $1 /mnt/kindle
sudo cp /home/jsvlrt/Pictures/KindleWallpapers/* /mnt/kindle/linkss/screensavers/
sudo touch /mnt/kindle/linkss/reboot
sudo umount /mnt/kindle