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CentOS & Ubuntu dual-boot

I was running gusty, then installed centos 4.5, including it's version of grub. (I'm typing from CentOS right now.) I added the ubuntu entry back to menu.lst:

Quote:

root (hd0,0)
kernel /vmlinuz-2.6.22-12-generic
initrd /initrd.img-2.6.22-12-generic

but it does not boot up properly. It stalls for a while, then dumps to initramfs. At this point, I'd rather have ubuntu back than have both OS's. How can I get it to boot again? /boot is /dev/hda1, ubuntu's / is /dev/hda5 and centos' / is /dev/hda6

thank you!

You did not enter details of your root partition in the kernel parameters section. The entry should be something like

Code:

title Ubuntu

    root (hd0,0)

    kernel /vmlinuz-2.6.22-12-generic root=/dev/hdX

    initrd /initrd.img-2.6.22-12-generic

Replace /dev/hdX with your root partition.