$ sha256sum /path/to/your/void.iso

The file with the checksums is called sha256sums.txt :-)  You're using 
md5sum


On Saturday, August 1, 2015 at 10:23:15 PM UTC-4, Userx Xbw wrote:
>
>
>  userx@void :^VOid-XFCE4-iso^ @~&md5sum void-live-x86_64-20150713-xfce.iso
>
> 738244c81a0ae396fb5f8e237d8640d5  void-live-x86_64-20150713-xfce.iso
>
> this checksum is off Download sight
>
> 32981bfb9d9dc9b36e15444186c3917b538797b6dc305afbdf1773272130685d  void-live-x86_64-20150713-xfce.iso
>
> their is a conciderable difference -- what to do ? can this downloaded ISO be trusted for a good install?
>
>
>