This page documents the method I use to wipe a hard disk.
dban no longer works for me. Instead I use a ubuntu live USB.
(I created a live USB in windows using rufus.)
It is possible to browse the disk using nautilus
sudo mkdir /media/windows
sudo mount /dev/(yourdevice) /media/windows -o force
(May not work if bitlocker is in use on drive)
Command to shred:
sudo shred -v /dev/sdb
shred wipe dban disk clear clean format boot usb cdrom cd-rom