grep -E 'menuentry|submenu' /boot/grub/grub.cfg
if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
  menuentry_id_option=""
export menuentry_id_option
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-7e2beb8f-393b-4445-ab82-69824a812d6c' {
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-43-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-43-generic-advanced-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-43-generic (upstart)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-43-generic-init-upstart-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-43-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-43-generic-recovery-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-42-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-42-generic-advanced-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-42-generic (upstart)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-42-generic-init-upstart-7e2beb8f-393b-4445-ab82-69824a812d6c' {
    menuentry 'Ubuntu, with Linux 4.15.0-42-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-42-generic-recovery-7e2beb8f-393b-4445-ab82-69824a812d6c' {
menuentry 'Memory test (memtest86+)' {
menuentry 'Memory test (memtest86+, serial console 115200)' {