Booting multiple versions of the kernel

Hello all,

I have a Debian system that came with 2.2.20 kernel, and to get X
windows started I needed to re-compile 2.4.24 kernel, and copied the
kernel and system map files to /boot. I have read the Lilo HOWTO,
that did not answer my question, which is, if I wanted to boot to
2.2.20 or 2.4.24, do I have to worry about the "map=" line in
lilo.conf? If so, what do I need to do?

Right now I have,

map=/boot/System.map-2.4.24

and I am booting to the 2.4.24 kernel file. If I want to boot to
2.2.20, does that map line need to change?

Thanks for your time,
Nick

Nick Hesson wrote:
> Hello all,
>
> I have a Debian system that came with 2.2.20 kernel, and to get X
> windows started I needed to re-compile 2.4.24 kernel, and copied the
> kernel and system map files to /boot. I have read the Lilo HOWTO,
> that did not answer my question, which is, if I wanted to boot to
> 2.2.20 or 2.4.24, do I have to worry about the "map=" line in
> lilo.conf? If so, what do I need to do?
>
> Right now I have,
>
> map=/boot/System.map-2.4.24
>
> and I am booting to the 2.4.24 kernel file. If I want to boot to
> 2.2.20, does that map line need to change?
>
> Thanks for your time,
> Nick

Yes. When a kernel is compiled, a system map (file) is also created (to
help compile code that directly interfaces with the kernel).

You will need to use the system.map for the 2.2.20 kernel. It is
normally found in /usr/src/linux-2.x.xx.

--
Ben M.

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