I have read about
dd and see that it can be used to securely wipe a HDD. But there is also a program called DBAN to wipe the HDD as well.
I know that using a live gnu-linux ISO I can wipe my HDD by issuing following command several(say 25) times
sudo dd if=/dev/urandom of=/dev/sda# bs=4M
my question is what's the difference between using
DBAN and can one claim that one of them is superior to the other and why?