Hallo every body!!!
Well there is where i'm in troubel...
The begin:
"I read Kyle Rakin's colum about this moths Lightning hacks strike twice, my interes was focus on the dd image over ssh" before this I've heard about dd but I didn't know how wonderfull (and powerfull) it is.
Next step-the do:
I start make a hole dd over my disk to a image file...
dd if=/dev/sda of=/media/paseo/imagen/imagen.img
this works fine but now...
The problem:
The idea is that I want to mount this image...exactly is the root partition for later recover some files for example--like
mount -t ext3 -o loop /media/paseo/imagen/imagen.img /media/net

thet output of the error msg

mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
En algunos casos se encuentra información en syslog, pruebe
dmesg | tail o algo parecido

this is my dmesg |tail

[16563.291016] mtrr: no more MTRRs available
[25143.183670] VFS: Can't find ext3 filesystem on dev loop0.
[27605.632847] VFS: Can't find ext3 filesystem on dev loop0.
[27609.437021] VFS: Can't find ext3 filesystem on dev loop0.
[36690.146233] VFS: Can't find ext3 filesystem on dev loop0.

so I start searching in the inet
this point me at first time to

where I extract that I have to type

fdisk -l -u /media/paseo/imagen/imagen.img

the output of this is

Debe establecer cilindros.
Puede efectuar esta operación desde el menú de funciones adicionales.

Disco /media/paseo/imagen/imagen.img: 0 MB, 0 bytes
255 heads, 63 sectors/track, 0 cylinders, 0 sectores en total
Units = sectores of 1 * 512 = 512 bytes
Disk identifier: 0xb7d8b185

Disposit. Inicio Comienzo Fin Bloques Id Sistema
/media/paseo/imagen/imagen.img1 63 2152709 1076323+ 82 Linux swap / Solaris
/media/paseo/imagen/imagen.img2 2152710 15759764 6803527+ 83 Linux

from this it make me clear that there was two partitions....
AND I want to mount the second yes... my file system...

in this forum the guy Halgeir point me to ---this page http://edseek.com/~jasonb/articles/linux_loopback.html

where I read on....

and at the point where it gets interest for me (at the last page I told about) with the title "Mounting by First Extracting the Partition"

I make exact what this guy tell about (with my image paramaters) and it don't function...

At the end I make a image (alone) of my root partition /dev/sda2 and have after it mounted whithout any problem...!!!

So my question is how can I extract with dd a partition (the exactly parameters or funtions), from a hole image of a disk!!!

Thanks at all.