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#!/bin/sh
# stdin: default config
# stdout: modified config
set -e
# 1) and 2) remember last selected entry; 3) disable submenu
sed '
s|^GRUB_DEFAULT=0$|GRUB_DEFAULT=saved|;
s|^#GRUB_SAVEDEFAULT="true"$|#GRUB_SAVEDEFAULT="true"|;
s|^#GRUB_DISABLE_SUBMENU=y$|GRUB_DISABLE_SUBMENU=y|;
'