I installed 3 OS, Win2000 then Ubuntu6 and then Fedora5 (in this order) on the same machine. Grub sees Win200 and Fedora5 and can boot to them. I can't see Ubuntu6 nor can I boot it up. I need some help to get Grub to boot all three OS if its possible.

hde1 (Win2000)
hde2 (Ubuntu /)
hde3 (Ubuntu swap)
hde4 (extended)
hde5 (fedora /boot)
hde6 (fedora /)
hde7 (fedora swap)
Thanks.

What's in your /boot/grub/menu.lst now?

Do you mean hde?? Where are hda, hdb, hdc, and hdd?

The typical Linux installer seems to have no problem recognizing the Windows install---but often does not detect the other Linuxes. When you installed Fedora, you presumably let it install GRUB and it did not see the Ubuntu.

From Fedora, go into the Ubuntu partition (hde2) and look in /boot to get the names of the kernel(vmlinuz) and initrd files. (I always soft link these to simply "vmlinuz" and "initrd" to make things easier.)

Then, go to the Fedora /boot/grub directory and edit menu.lst to add this entry: (I'm assuming that you actually have one drive---hda)
title Ubuntu
root (hd0,1) (this tells GRUB that the Ubuntu /boot dir is on drive 1, partition 2)
kernel /boot/vmlinuz root=/dev/hda2
initrd /boot/initrd
boot

(I assumed here that you made soft links to the file names)

Here is some more detail on how all this works.

Boot menu list..

# root (hd0,4)
# kernel /vmlinuz-version ro root=/dev/hde6
# intrid /intrid-version.img
# boot=/dev/hde
default=999
timeout=999
splashimage=(hd0,4)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.15-1.2054_FC5)
root (hd0,4)
kernel /vmlinuz-2.6.15-1.2054_FC5 ro root=LABEL=? rhgb quiet
intrid /intrid-2.6.15-1.2054_FC5.img
title Windows
rootnoverify (hd0,0)
chainloader +1

As I said, you need to add an entry for Ubuntu.

I am following your directions.. I added the entry for Ubuntu.
I also placed /dev/hde2 (Ubuntu /)in /etc/fstab and I can mount it on Fedora5.
Having trouble viewing the /boot in /dev/hde2.

Thanks you very much for your help.

Thanks pixellany it worked..