changing from grub to lilo

**nikhil** · 12-18-2003

can someone pls post their grub.conf file so that I can use it as a reference, just in case.

Thanks.

**Dolda2000** · 12-19-2003

Here's mine:

Code:

# cat /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE&#58;  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root &#40;hd0,0&#41;
#          kernel /vmlinuz-version ro root=/dev/hda5
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=10

#title Gentoo Linux 1.4/Linux 2.6.0-test8-mm1
#       root &#40;hd0,0&#41;
#       kernel /vmlinuz-2.6.0-test8-mm1 ro root=0306 gentoo=nodevfs hdc=ide-scsi hdd=ide-scsi
title Linux 2.6.0
        root &#40;hd0,0&#41;
        kernel /vmlinuz-2.6.0 ro root=0305
title Linux 2.6.0-test11
        root &#40;hd0,0&#41;
        kernel /vmlinuz-2.6.0-test11 ro root=0305
title Chainload hda6
        chainloader &#40;hd0,5&#41;+1

**nikhil** · 12-19-2003

cool..thanks a bunch.

**nikhil** · 12-19-2003

hey Dolda,

one quick question, what does the root=0305 in your grub.conf file indicate?

**nikhil** · 12-19-2003

Dolda,

I read that I have to enter the equivalen of 'cat /proc/cmdline'
in the gurb.conf file at the end of the kernel line.
Can you tell me what cat /proc/cmdline does?

**nikhil** · 12-19-2003

after I modify grub.conf, do I need to run any command to write the data to the MBR? like if I modify lilo.conf i have to run /sbin/lilo...is there somethg similar for grub.conf?

**Dolda2000** · 12-20-2003

OK...

Originally Posted by nikhil

what does the root=0305 in your grub.conf file indicate?

03 is the major device number for the first IDE bus, and 05 is the minor number for the 5th partition on the master unit on that bus. If you run "ls -l /dev/hda5", you'll see both numbers. Note that they are to be given in hexadecimal, although that isn't clear in my example, since both numbers are below ten.

Originally Posted by nikhil

Can you tell me what cat /proc/cmdline does?

/proc/cmdline will mirror whatever was on the kernel command line. What they probably mean is that if you have a working system, you can check /proc/cmdline for whatever kernel command line worked to get it to boot, and then just reuse that command line when you install a new kernel or boot loader.

Originally Posted by nikhil

after I modify grub.conf, do I need to run any command to write the data to the MBR? like if I modify lilo.conf i have to run /sbin/lilo...is there somethg similar for grub.conf?

No, that's one of the additional strengths of GRUB. The only thing that is encoded in the boot sector is the path to the config file, so as long as you don't rename the config file, GRUB will reread it every time you boot.

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