[CentOS] help fdisk and dd

> Hi all
>
> What is the best practice to remove all data in the disk?
>
> ls fdisk ok or use dd
>
> Can data be recovered?
>
> and what is the dd command?
>
> Thank you
>

<http://www.dban.org/>

Default with boot and nuke is three (or is it four?) passes, but you can
tell it full US DoD seven passes, which meets all US gov't requirements
for data destruction, and no, you can't get it back.

Alternatively, the answer on another techie mailing list I'm on is that
you could disassemble the disks and use thermite.

          mark