<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jan 30, 2014 at 3:01 PM, Karl Auer <span dir="ltr"><<a href="mailto:kauer@biplane.com.au" target="_blank">kauer@biplane.com.au</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
</div>If you just delete the files, the data remains on disk and can be<br>
reconstructed. In fact, it is quite easy to reconstruct, and there are<br>
programs that will do it for you. Even formatting the disk will not<br>
remove all the data.<br>
<br>
To properly sanitise a disk, hit it several times with a large<br>
sledgehammer :-)<br>
<br>
Alternatively, use "shred". This takes a long time, but will very<br>
effectively destroy all the data on a disk. Read the man page though,<br>
because there are some limitations depending on the type of disk and the<br>
disk format.<br>
<br>
sudo shred /dev/whatever<br>
<br>Karl has it -- use shred. And wait. shred, like any other disk scrubber, will take a long time to end (from a few hours to many, depending on the size of the disk, and your paranoia).</blockquote><div><br></div><div>
..C.. </div></div></div></div>