ZIYAD A. M. AL-BATLY
zamb at saudi.net.sa
Sat Jul 9 02:55:38 UTC 2005
On Fri, 2005-07-08 at 16:21 +0200, René L. Reingard wrote:
> HI ZIYAD
> i read man-page of Wipe. my technical english is not so well, frankly
Here too. I'm not a native English speaker myself.
> so i don't get it straight. what is Wipe finally capable doing?
> file system here is EXT3, and i did not change any settings so far on
> EXT3. no idea of how to do that anyway, haha.
> if doing the wiping of a file, Wipe does its job without telling anything
> regarding journaling filesystem, and related problems.
> and there is also no error occuring.
> the idea is still, that i have a possibility to delete/erase any file i
> want without the possibilty of any recovery/un-delete.
> what is the solution here (in Linux / Ubuntu)?
> thanks for talking on that,
In a nutshell, "wipe" will *not* help you! Sorry, but "EXT3" is a
"journal file-system"¹ which means that "wipe"² and "shred"³ can not do
their work right.
There are two solutions for you:
1. Use encrypted file-system (as mentioned by Lee Braiden)
2. Don't use a journal file-system
Since Lee Braiden is discussing No. 1, I'll cover No. 2 here.
You said you have an EXT3 file-system (which is the default in Ubuntu).
To disable the journal, mount it as EXT2 by doing this:
Make a backup of "/etc/fstab" in a safe place (You could print it in a
paper). Find the line in your "/etc/fstab" that have only "/" as it's
2nd argument. It should look something like:
/dev/hda1 / ext3 defaults 0 1
Now, change the 3rd argument of that line to "ext2". Your line should
look like this:
/dev/hda1 / ext2 defaults 0 1
Reboot your system. To make sure it's now an EXT2 file-system, run "df
-T /" like this:
zamb ~ $ df -T -h /
Filesystem Type Size Used Avail Use% Mounted on
/dev/hda1 ext2 9.8G 9.6G 191M 99% /
At this point, your system doesn't use "journal file-system", and as a
result "wipe" and "shred" should work fine.
If you didn't understand any of the above, just ask again. Do *NOT* do
anything you don't understand. Just ask again here.
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