GRUB_TIMEOUT="5" GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" GRUB_DEFAULT="0" GRUB_DISABLE_SUBMENU="true" GRUB_TERMINAL_OUTPUT="console" GRUB_DISABLE_RECOVERY="true" GRUB_ENABLE_BLSCFG="true" GRUB_SAVEDEFAULT="false"