[Tiny-tux] Another SD card question

Corey McGuire coreyfro at coreyfro.com
Sat Apr 23 02:37:48 UTC 2011

sfill and bzip!

sfill will wipe all the empty space on the filesystem with 0's, and then you
follow it with bzip of the actual device.  That way you don't zip up any
deleted files that remain on your filesystem.

sudo apt-get install secure-delete

This has four tools:

srm - securely delete an existing file
smem - securely delete traces of a file from ram
sfill - wipe all the space marked as empty on your hard drive
sswap - wipe all the data from you swap space.

On Fri, Apr 22, 2011 at 9:56 AM, Alison Chaiken <alchaiken at gmail.com> wrote:

> Thanks to Corey and Akkana for their previous helpful suggestions
> about formatting and check-summing SD cards.    Here's a helpful
> resource which I can't remember posting here before:
> http://lwn.net/Articles/428584/
> Optimizing Linux with cheap flash drives
> Meanwhile, I have another question: what is the best way to back up an
> SD card?    I could use the usual methods for backing up a Linux
> filesystem, but given that SD cards are removable and have smaller
> filesystems, is there a better way?   Thanks for any suggestions, as
> always.
> --
> Alison Chaiken
> (650) 279-5600  (cell)
>              http://www.exerciseforthereader.org/
> A career in Silicon Valley is just like a chess game, only players can
> move all the pieces every turn and some of the pawns bite.
> _______________________________________________
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