dban, also known as Darik's Boot and Nuke, is a tool based on Linux used erase hard disks permanently and securely.
dban is a tool used to erase hard disks by overwriting the data with psuedorandom numbers generated by ISAAC. dban is often used when donating or selling a computer. dban is based on Linux, and can be booted by CD, DVD, USB, and more. dban is open-source and can be downloaded from sourceforge. The dban website holds useful information on dban.