mailing list archives
*nix data wipe tools
From: "Thomas C. Greene" <thomas.greene () theregister co uk>
Date: Wed, 15 Dec 2004 02:59:44 -0500
I've posted the final versions of a few simple, free shell scripts that i've
been working on to make data hygiene more convenient on *nix systems. Thanks
to list members who helped test them and contributed improvements.
Download them at http://basicsec.org/tools.html The file is called
The purpose here is to simplify regular maintenance. These tools are not
intended as substitutes for the wipe and shred utilities, which should always
be used on sensitive individual files. What i have here are backup tools that
will easily and securely wipe large areas of the disk that might contain data
traces you've neglected, or failed to eliminate properly.
The scripts are meant to clean large disk areas safely and conveniently while
you work with your system. They are intended for basic, regular maintenance:
i.e., to eliminate duplicate data traces in obscure areas of the disk, and
the remnants of files that have merely been deleted. There is nothing here
that you couldn't do from the command line: the idea is to make it convenient
so that you *will* do it. Often.
The WipeSwap script will automatically detect your swap device, stop it, wipe
it securely, and re-create it. This usually takes only 20-30 minutes. The
swap partition is a great accumulator of unforseen and/or forgotten data, and
should be wiped regularly. This makes it easy and safe.
The WipeFree scripts will securely wipe un-allocated disk space, where the
remnants of deleted files may remain. Again, this merely simplifies the
Please see the README file for caveats and a more detailed explanation.
Thanks to the courage of numerous volunteers, i can say that the scripts
appear to work safely and effectively on a variety of Unix, BSD and Linux
Many thanks to Conrad Wood and David C. Niemi for improvements they
contributed, and to Jim Knopf for an important fix and several excellent
Thomas C. Greene
Full-Disclosure - We believe in it.
- *nix data wipe tools Thomas C. Greene (Dec 17)