thanks for every body, Ok, andreas,
the problem is the Debian installer, and specially the aptitude, is very dificult for the novie,
I asked many times the developper to insert something like anaconda, refuse ???!!!
any way, I use knoppix only for the the first installation ( recognition of the hardwares , graphics ...) after that I complete the installation. I am a teacher and try to find the more simple installation for my students.
So I am trying more distos ( I used RH very fine for new user, I preferre Debian, my big problem is the installer).
Now coming back to the initial problem, this is what I did completly:
I used RH 9.0 : linux rescue ( the installer of debian, doesn't have a rescue from a CD?? I HAVE TO FIND ONE to test with) ,
the first problem: No partition linux detected , of course it exists : fdisk /dev/hda gives the linux partitions and the swap
it gives a shell prompt: I creat a mount point /mnt/sys
and mount /dev/hda1 /mnt/sys
chroot /mnt/sys this was doing correctly
I ran lilo
The output is :
/dev/mapper/control : no such device
Is device-mapper device missing from kernel, Incompatiblelibdevmapper and kernel
--------------------> I think here the because kernel of RH9.0 and knoppix (2.4 ) is not compatible
/proc/partitions doesn't exists ?????
added linux * added linux (2.4)-1 added linux (2.6)-2
So the file lilo.conf is read and the lilo is installed !!??
Now I can access to my machine like this init 5 su - bela ( the count is created at the installation) startx
and every thing is fine
so the problem is only how to start the kernel
thank you for help bela
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