How to reload a new kernel (Ubuntu 10.10)

Dears,

I have installed a new kernel from a deb. However, the new kernel does
not be loaded at boot.

The /boot/vmlinuz and the /boot/initrd.img are linked to the new ones.

IIRC, in x86 system the command such as grub or lilo should be ran to
reload the new Linux kernel. However, in beagleboard what should I do?

if you just added a new kernel and did not remove the previous one,
then one easy way to recover is to put the SD on your PC, mount the
boot partition as well as the root FS partition and replace uImage and
uInitrd on the boot partition by the previous ones that are in the
root fs in /boot

if you did not remove the old kernel, the associated modules will
still be around in /lib/modules, so you should boot fine.

then you can remove the broken kernel with apt-get remove xxx command.

nicolas