Re: [gentoo-user] Gentoo failed to start

[Richard Fish]

On 9/1/06, Stephen Liu <satimis@×××××.com> wrote:
> I think I have to run another round again wiping out the complete HD.

Yeah, I think so...

> Another thing, what did you mean "...Use whatever name you feel is
> appropriate for your kernel choice and remember it as you will need it
> later on when you configure your bootloader. Remember to replace
> kernel-2.6.17-gentoo-r5 with the name and version of your kernel."

When you compile the kernel, it is going to build a file called
bzImage, that you have to copy to /boot.  But it is very rare to copy
it to /boot/bzImage...most linux users will rename the file to
something else.  Some people (and helper scripts like genkernel)
prefer to use the full version of the kernel, so if you build a kernel
from gentoo-sources-2.6.17-r5, you might:

cp arch/x86_64/boot/bzImage /boot/linux-2.6.17-gentoo-r5
... or ...
cp arch/x86_64/boot/bzImage /boot/vmlinuz-2.6.17-gentoo-r5
... or ...
cp arch/x86_64/boot/bzImage /boot/mykernel-17r5

It is usually a good idea to keep a backup kernel in /boot that you
can use in case a kernel upgrade goes wrong.  So I usually keep 2
kernels, /boot/vmlinuz-2.6 and /boot/vmlinuz-safe.  Once I know that
vmlinuz-2.6 boots and works reliably, I will copy it to -safe.

The second part about remembering the name for your boot loader refers
to your menu.lst/grub.conf entries.  You must specify the actual name
that you copied your kernel image to, or (as you already saw), you
will get a "file not found" when you try to boot.

So if you copy bzImage to /boot/vmlinuz-2.6, you must use an entry like:

title Whatever
    kernel hd(0,0)/vmlinuz-2.6 ...

The title doesn't really matter, but the "kernel" line needs to
reference your actual kernel file.

Clear?

-Richard
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