#!/bin/sh -efu

GRUB_CFG=/etc/sysconfig/grub2

[ -s "$GRUB_CFG" ] || exit 0

GRUBTHEME="$(cat "$GRUB_CFG" |grep '^GRUB_THEME=.*' |tail -n 1)"
GRUBTHEME="${GRUBTHEME%/*}"
GRUBTHEME="${GRUBTHEME##*/}"

[ -z "$GRUBTHEME" ] || exit 0

sed '/^GRUB_TERMINAL_OUTPUT=.*/d' -i "$GRUB_CFG"
echo 'GRUB_TERMINAL_OUTPUT="console"' >> "$GRUB_CFG"