for i in  MD5SUMS  debian-8.4.0-amd64-xfce-CD-1.iso
do
wget http://cdimage.debian.org/debian-cd/8.4.0/amd64/iso-cd/$i
done
grep  debian-8.4.0-amd64-xfce-CD-1.iso MD5SUMS >> debian-8.4.0-amd64-xfce-CD-1.iso.md5
md5sum debian-8.4.0-amd64-xfce-CD-1.iso >> debian-8.4.0-amd64-xfce-CD-1.iso.md5

# sudo dd if=debian-8.4.0-amd64-xfce-CD-1.iso  of=/dev/sdb bs=64k