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dual booting two Linux distros

Posted on 2006-06-21
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Last Modified: 2013-12-15
my system has windowsXP and Linux enterprise redhat 3.0 . now i wanted to install another Linux distro RHEL AS4.0..(TRIPLE BOOT)
but when i started the installation..the bootloader of RHEL AS version is not recognising the RHEL 3.0 OS..it shows only the WindowsXP and RHEL AS4.0 in the list..

how can i triple boot or have two Linux OSes in a single hard disk.......?
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Question by:swapan2005
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bmquintas earned 100 total points
ID: 17032336
Take a look at my menu.lst (in ubuntu)

You did a small error during instalation:
You "told" RHEL AS4 to write the boot loader in MBR,  and the it overwrited the previous grub (or lilo??) instalation,  so now you should edit /etc/grub.conf and create an entry to add the option to boot from RHEL 3.0

In my case i have 3 hdd(1 ide,2 sata)  the parameter (hd0,0) means first drive, first partition, and so on

title           Ubuntu, kernel 2.6.15-25-386
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.15-25-386 root=/dev/sda1 ro quiet splash
initrd          /boot/initrd.img-2.6.15-25-386
savedefault
boot
title           Ubuntu, kernel 2.6.15-25-386 (recovery mode)
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.15-25-386 root=/dev/sda1 ro single
initrd          /boot/initrd.img-2.6.15-25-386
boot
title           Ubuntu, kernel 2.6.15-23-386
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.15-23-386 root=/dev/sda1 ro quiet splash
initrd          /boot/initrd.img-2.6.15-23-386
savedefault
title           Ubuntu, memtest86+
root            (hd0,0)
kernel          /boot/memtest86+.bin
boot
### END DEBIAN AUTOMAGIC KERNELS LIST
 title         Windows Vista
 root          (hd2,0)
 makeactive
 chainloader   +1

title           Ubuntu 6.06 LTS - CA testing
root            (hd1,0)
kernel          /boot/vmlinuz-2.6.15-23-386 root=/dev/sdb1 ro quiet splash
initrd          /boot/initrd.img-2.6.15-23-386
savedefault
boot

title           Slackware 10.2
root            (hd1,1)
makeactive
chainloader   +1
0

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