cat > /etc/grub.d/30-uefi-firmware << EOF
## BEGIN /etc/grub.d/30_uefi-firmware
menuentry 'System setup' $menuentry_id_option 'uefi-firmware' {
fwsetup
}
## END /etc/grub.d/30_uefi-firmware
EOF
## GRUB 커맨드에서
> fwsetup
# systemctl reboot --firmware-setup