Please run the following script to find out if your system is UEFI or BIOS
#!/bin/bash
[ -d /sys/firmware/efi ] && fw=”UEFI” || fw=”BIOS”
echo -e “$fw”
if [ “$fw” == “UEFI” ] ; then
mygrub=’/boot/efi/EFI/redhat/grub.cfg’
echo -e “\n\tUEFI detected, this is a ($fw) system., and the boot config is located at ($mygrub)”
else
mygrub=’/boot/grub2/grub.cfg’
echo -e “\n\t($fw) system detected your boot config is located at ($mygrub)\n”
fi