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Old 09-30-2004, 08:32 AM   #1
annointed3
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Registered: Aug 2004
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Changing Boot Loader from Lilo to Grub


Hi,

I would like to change my boot loader from lilo to grub. I have an already installed, fully functional, dual boot FC1 / W2K machine. From the research that I've done so far, I believe I would have to use fdisk /mbr command to remove lilo from mbr. I would then create a grub.conf file with the proper information, but I think there is something else I need to do. Isn't there some type of initd. file I have to modify? Well, If anyone can help, I would really appreciate it?

Thanks
 
Old 09-30-2004, 09:05 AM   #2
homey
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Registered: Oct 2003
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Hi,
You don't need to do the fdisk/mbr as installing the grub will over write it.

First, install the grub rpm. Using yum install grub or apt-get install grub is easy but you can go find an rpm or .gz and do things manually.

Then, while in the Linux system, run the command: grub-install /dev/hda
Note: that puts stage1, stage2 and a bunch of stuff in the /boot/grub directory.

If that didn't make a /boot/grub/grub.conf then you could create one and paste this info into it.
Note: change the kernel and initrd to match what you have.

Code:
# grub.conf generated by anaconda
#
# 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 (hd1,1)
#          kernel /boot/vmlinuz-version ro root=/dev/hdb2
#          initrd /boot/initrd-version.img
#boot=/dev/hda
default=1
timeout=15
splashimage=(hd1,1)/boot/grub/splash.xpm.gz
title Windows
	rootnoverify (hd0,0)
	chainloader +1
title Fedora Core 1
	root (hd1,1)
	kernel /boot/vmlinuz-2.4.22-1.2199.nptl ro root=LABEL=/ hdc=ide-scsi rhgb
	initrd /boot/initrd-2.4.22-1.2199.nptl.img

Last edited by homey; 09-30-2004 at 10:19 AM.
 
Old 09-30-2004, 10:41 AM   #3
annointed3
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Registered: Aug 2004
Posts: 8

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Hi,

Thanks for the input, but I have a problem.

I recently upgraded my dual boot (RH 7.1/ W2k) to (FC1 / W2k), when I did the upgrade it was suppose to update the boot loader.

Well, anyway now, when I boot up, it's still using the old kernel (2.4.5). When I try to run rpm commands, I get the following:

rpm: error while loading sharded libraries: libbeecrypt.so.6: cannot enable executable stack as shared object requires: Error 14

Well, I'm assuming that this error may be associated with FC! and old kernel. Here is an ouput from my current lilo.conf file

boot=/dev/hda2
map=/boot/map
install=/boot/boot.b
prompt
timeout=50
message=/boot/message
default=W_scanner

image=/boot/vmlinuz-2.4.22-1.2115.nptl
label=2.4.22-1.2115.n
read-only
initrd=/boot/initrd-2.4.22-1.2115.nptl.img
append="root=LABEL=/"

image=/boot/vmlinuz-2.4.5
label=Linux-2.4.5
read-only
root=/dev/hda5

image=/boot/vmlinuz-2.4.18
label=W_scanner

So, I can't install any rpms because the rpm command doesn't work and linux is booting up using the old kernel not the new one (2.4.22...., I don't even get an option for that kernel)

Any ideas?????
 
Old 09-30-2004, 01:25 PM   #4
homey
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Posts: 3,057

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Upgrading from 7.1 to FC1 is quite a leap and I'm not even sure if it will work.
You could try edit the lilo.conf so your Fedora label is short and alpha-numeric. Then run the command: /sbin/lilo -L

boot=/dev/hda2
map=/boot/map
install=/boot/boot.b
prompt
timeout=50
message=/boot/message
default=Fedora

image=/boot/vmlinuz-2.4.22-1.2115.nptl
label=Fedora
read-only
initrd=/boot/initrd-2.4.22-1.2115.nptl.img
append="root=LABEL=/"

image=/boot/vmlinuz-2.4.5
label=Linux-2.4.5
read-only
root=/dev/hda5

image=/boot/vmlinuz-2.4.18
label=W_scanner
 
Old 09-30-2004, 02:15 PM   #5
annointed3
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Registered: Aug 2004
Posts: 8

Original Poster
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Hi Homey,

I followed your directions and I did not get any errors when I ran the lilo command, but I think I'm missing something.

This machine was a machine that was built by someone else and was given to me to maintain and upgrade, so forgive me if I miss some things.

When I initially boot up the machine., i get a dos like menu with the choices:

Linux Redhat 7.1
Windows 2000 Professional
Win2k Pro within VMware only.

I assume this is from the boot.ini file in Windows. Should I have to make any changes to this file?

Well anyway I select Linux RedHat 7.1, Another windows pops up, more graphical, has a picture of a man with a hat,I'm assuming this is lilo, and gives me the following options:

Linux 2.4.5
Backup
Wscanner

Why am I not getting an option for Fedora? It's in the lilo.conf file, I don't understand?
 
Old 09-30-2004, 03:26 PM   #6
homey
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Registered: Oct 2003
Posts: 3,057

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It could be the upgrade route just isn't going to work.
 
Old 09-30-2004, 11:25 PM   #7
Neutron1998
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Registered: Sep 2004
Distribution: Fedora Core 3
Posts: 69

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What are the advantages of using grub over lilo?
 
Old 09-30-2004, 11:33 PM   #8
Glas
Member
 
Registered: Aug 2004
Location: Atlanta, GA
Distribution: Slackware, PC-BSD v0.6, FreeBSD v5.3
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The only difference I have noticed is being able to put a password on Grub so you can't pass exceptions to the kernel. Other than that I can't remember anything else. Work makes me stupid
 
  


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