Re: Securely wipe laptop hard drive

[Budi]

copy others to /home into another storage dev.  before shredding it,
put/copy back if still want use it

or simply make overwriting script to replace the sensitive files in
/home by good util e.g: sed -i .... , bash echo >, etc

On 9/25/21, Jeffrey Walton <noloader@gmail.com> wrote:
> On Sat, Sep 25, 2021 at 1:40 AM jedenfalco <jedenfalco@protonmail.com>
> wrote:
>> ...
>> > It can't, because that's not how shred works. Recursively shredding
>> > files within a larger filesystem does NOT guarantee that the old file
>> > is wiped out, because modern file systems tend to write the new file
>> > to a different part of the block storage while leaving the old storage
>> > unchanged other than marked as unused; with the right software, it's
>> > fairly trivial to read the contents of those areas of the disk.  ...
>>
>> Could it work on a specific partition?
>
> As Eric explained, it depends on the disk but the answer is likely no.
> For solid state drives see "Reliably Erasing Data From Flash-Based
> Solid State Drives,"
> https://www.usenix.org/legacy/events/fast11/tech/full_papers/Wei.pdf.
>
> Jeff
>
>