[SOLVED] LFS 7.7 Modifying existing Grub Boot Loader

thinkrorbot · 04-04-2015, 07:30 PM

Hello all,

How do I exit my existing grub.cfg file so that it can detect my LFS partition on start up.

I have a swap partition on sda10, root partition on sda11 and a boot partition on sda12.

So far I have added the following to grub.cfg

Code:

#Begin LFS setup
# "LFS-7.7 on (/dev/sda11)" {
#	savedefault
#	set root=/dev/sda12
#	linux   vmlinuz-3.19-lfs-7.7 root=/dev/sda11 ro
#}
#End LFS setup

I will uncomment it when I want to boot into the lfs partition

Are there any modifications I have to make for it to work?
Thanks

zeshanuk · 04-04-2015, 07:38 PM

Hi, I think you should have something like this:

menuentry 'LFS 7.7' {
insmod ext2
set root='(hd0,12)'
linux /boot/vmlinuz-3.19-lfs-7.7 root=/dev/sda11 ro single
}

thinkrorbot · 04-04-2015, 08:37 PM

Thanks, I will try it soon.

zeshanuk · 04-04-2015, 09:01 PM

ok,cool

thinkrorbot · 04-04-2015, 10:24 PM

The entry was there but it came up with this message:
/boot/vmlinuz-3.19-lfs-7.7 not found or doesn't exist

Maybe it has something to do with the boot partition not mounted?
The file itself is in the boot partition.

veerain · 04-04-2015, 10:42 PM

Which version of grub do you have?

For testing always use grub command line to boot kernels. Afterwards you can make a grub.cfg entry.

Find out the path of kernel file in sda12. Is it in a subdirectory named boot or in root of that filesytem. If in root then you have to pass just '/vmlinuz-3.19-lfs-7.7'.

thinkrorbot · 04-04-2015, 11:00 PM

My version of Grub is :2.02~beta2-9ubuntu1

In sda12, vmlinuz-3.19-lfs-7.7 is in the root of that file system.

thinkrorbot · 04-04-2015, 11:09 PM

Thanks veerain, LFS can now boot by just passing vmlinuz-3.19-lfs-7.7 the file.