[CentOS] wiping out data on a disk (no physical acess to the machine)

Tue Jan 8 22:06:29 UTC 2013
Yungwei Chen <yungwei at resolvity.com>

Hi,

I need to securely wipe out a disk on a remote machine, but I don't have access to that machine.
Therefore I cannot use the LiveCD+shred (or dd) combination.
Besides manually shreding known data files, I am wondering if there is a (free) tool that can be used in my case.
Thanks.