Booting Ubuntu

[Brayn]

Hey guys

Well first off im a total n00b at linux so plz be gentle.

Well I just installed ubuntu and got that up and running, so I then went and installed FC3 back on so that installed grub back on and I wont to know how I can edit grub so I can boot into Ubuntu, so if anyone could help that would be great

[macemoneta]

We'll need to know what partitions and hard drives you installed each operating system into in order to figure out the necessary grub configuration.

[Brayn]

ok then,

ive got two hdd and on the first ive got windows, on the second ive got Ubuntu on the first partition and FC3 on the second

heres my grub.conf

# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd1,2)
# kernel /boot/vmlinuz-version ro root=/dev/hdb3
# initrd /boot/initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,2)/boot/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.9-1.681_FC3)
root (hd1,2)
kernel /boot/vmlinuz-2.6.9-1.681_FC3 ro root=LABEL=/ quiet
initrd /boot/initrd-2.6.9-1.681_FC3.img
title Windows
rootnoverify (hd0,0)
chainloader +1

[macemoneta]

OK, your Ubuntu boot should look like:

title Ubuntu
root (hd1,1)  
kernel /vmlinuz root=/dev/hdb1 ro 
initrd /initrd

The above is assuming that you have both HD on the same IDE cable. If not, change root=/dev/hdb1 to root=/dev/hdc1.

You can also boot Fedora and mount the Ubuntu partition to look at the grub configuration that it had created, and copy the relevent portion to the Fedora grub.conf. For example:

mkdir Ubuntu
mount -t ext2 -o ro /dev/hdb1 Ubuntu
cat Ubuntu/etc/menu.1st