These are the steps I used to replace LILO with GRUB as the boot manager after upgrading my kernel to v3.

Download directly and install:

wget http://slackware.osuosl.org/slackware-13.37/extra/grub/grub-0.97-i486-9.txz
installpkg grub-0.97-i486-9.txz

Then jump to Step 3 and make sure you skip Step 4.

  1. If you haven’t set any mirror for your slackpkg, you need to edit your mirror list:

    vim /etc/slackpkg/mirrors

    Add a mirror, for an example, I use the one from Oregon State University: http://slackware.osuosl.org/slackware-13.37/

    Do not forget the trailing /.

  2. Run the update:

    slackpkg update

  3. Remove LILO

    removepkg lilo

  4. Install GRUB

    slackpkg install grub

  5. Run configuration editor for GRUB (just like liloconfig):

    grubconfig

    This is my working config from /boot/grub/menu.lst

    # GRUB configuration file '/boot/grub/menu.lst'.
# generated by 'grubconfig'.  Fri May 11 02:21:11 2012
#
# The backup copy of the MBR for drive '/dev/sda' is
# here '/boot/grub/mbr.sda.1594'.  You can restore it like this.
# dd if=mbr.sda.1594 of=/dev/sda bs=512 count=1
#
# Start GRUB global section
#timeout 30
#color light-gray/blue black/light-gray
# End GRUB global section
# Linux bootable partition config begins
  title slackware on (/dev/sda1)
  root (hd0,0)
  kernel /boot/vmlinuz root=/dev/sda1 ro vga=normal
  initrd /boot/initrd-3.2.13-smp
# Linux bootable partition config ends
title --- For help press 'c', type: 'help'
root (hd0)
title --- For usage examples, type: 'cat /boot/grub/grub.txt'
root (hd0)

That’s it :)

References:#