Script to update the Grub.

brain_load.sh

#!/bin/bash 

# current version 

CURRENT=$(uname -r)

#highest version in on system 

HIGH=$(rpm -qa kernel  | cut -c 8- | sort|  head -n 1)

#number of Kernels on the system

TOTAL_KERNEL_COUNT=$(sudo egrep "^title" /boot/grub/grub.conf > number_of_brains.txt) 

#highest kernel in the grub 

HIGH_KERNEL_GRUB=$(grep -in `rpm -qa kernel  | cut -c 8- | sort|  head -n 1`  number_of_brains.txt | cut -b 1)

if [ $CURRENT = $HIGH ]

then 

  echo " Everything up-to-date "

else

  cp /boot/grub/grub.conf /boot/grub/grub.bak

  default=$(expr $HIGH_KERNEL_GRUB - 1) 

  sed -i "s/default*/default=${default}/" /boot/grub/grub.conf 



fi