Originally Posted by pixellany
Easier: Get a copy of Darik's boot and nuke. Boots from floppy, and includes DOD-spec routines for "shredding" classified data.
Maybe, but DBAN will wipe the attached drives. The thread author is only looking to securely remove a single file or set of files.
In essence, overwriting with random data should be fine. Be sure to consider other aspects such as slack space. There are 'secure file deletion' threads all over this forum, as well as tools all over the internet.