Boot CDrom from grub

Boot CDrom from grub

[Niklaus]

Hi,
 I have a bootable CD and normal ISO9660 data CD (linux non-bootable)
, both has linux on it.
 I don't have the BIOS password and hence cannot change the bios
startup options.

1) Is there any way to boot the CD from grub command line ?

 2) Can i access the data in ISO9660 from grub command line ?

I can boot a floppy like root(fd0)
chainloader +1
boot

simlarly windows partition like root(hd0,2)
chainloader +1
boot

Is there anything for bootable CD .

How to access data in ISO CD . Can we do it like ext2 of harddisk.

Regards
Nik

Re: Boot CDrom from grub

[Arjan van de Ven]

On Mon, 2006-04-17 at 18:55 +0530, Niklaus wrote:
> Hi,
>  I have a bootable CD and normal ISO9660 data CD (linux non-bootable)
> , both has linux on it.
>  I don't have the BIOS password and hence cannot change the bios
> startup options.
> 
> 1) Is there any way to boot the CD from grub command line ?

if you are asking this to install a linux distro on your machine,
you can just copy the vmlinux and the initrd.img (Fedora names, but most
likely other distros have named these similar) to your /boot and add
these to grub.conf and boot them that way.

if you are asking this because you want to hack a system please go away.
 

Re: Boot CDrom from grub

[Valdis.Kletnieks]

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On Mon, 17 Apr 2006 18:55:48 +0530, Niklaus said:
> Hi,
>  I have a bootable CD and normal ISO9660 data CD (linux non-bootable)
> , both has linux on it.
>  I don't have the BIOS password and hence cannot change the bios
> startup options.

If you have enough physical access to boot the machine from a CD, you have
enough access to work around the BIOS password problem.  In almost all cases,
cracking the case and changing/removing a jumper on the motherboard will
bypass/reset the password, and Google will tell you which jumper it is.

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Re: Boot CDrom from grub

[Kyle Moffett]

On Apr 17, 2006, at 13:41:59, Valdis.Kletnieks@vt.edu wrote:
> If you have enough physical access to boot the machine from a CD,  
> you have enough access to work around the BIOS password problem.   
> In almost all cases, cracking the case and changing/removing a  
> jumper on the motherboard will bypass/reset the password, and  
> Google will tell you which jumper it is.

This is true; with the exception of some incredibly poorly designed  
HP desktops I once had the misfortune of administrating.  For some  
insane reason HP decided to store the BIOS password in flash RAM and  
declined to provide any method for resetting it.  In the manual, they  
specified "If you for any reason forget your BIOS password, please  
ship the computer to a certified service station to have it reset".   
The only other known way is to unsolder the surface-mount flash chip  
from the MB and place it in a flash writer.

We've since managed to lose the passwords for a few of those  
desktops; is there any way to get linux to overwrite the flash RAM  
soldered to the motherboard?

Cheers,
Kyle Moffett