Re: Tool to wipe unused disk space?

Ennio Battaglia <ennio@xxxxxxxxxxxxxxxx> writes:

Hi all,

I'm about to send my notebook away for repair, and I would like to make
sure that the data I've erased from the HD is not recoverable.

Is there a Linux tool for overwriting unused disk space (not existing
files) with garbage, in order to make the old data unreadable?

My filesystem is ext3.

Thanks in advance!
cat /dev/urandom>/tmp/junk
(or even cat /dev/zero>/tmp/junk
When this stops due to running out of room,
rm /tmp/junk.

And the same on each of the other partitions.

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