Here is what cat /boot/efi/EFI/fedora/grub.cfg spits out:
BEGIN /etc/grub.d/00_header
set pager=1
if [ -f ${config_directory}/grubenv ]; then
load_env -f ${config_directory}/grubenv
elif [ -s $prefix/grubenv ]; then
load_env
fi
if [ “${next_entry}” ] ; then
set default=“${next_entry}”
set next_entry=
save_env next_entry
set boot_once=true
else
set default=“${saved_entry}”
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option=“–id”
else
menuentry_id_option=“”
fi
export menuentry_id_option
if [ “${prev_saved_entry}” ]; then
set saved_entry=“${prev_saved_entry}”
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z “${boot_once}” ]; then
saved_entry=“${chosen}”
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
terminal_output console
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=5
Fallback normal timeout code in case the timeout_style feature is
unavailable.
else
set timeout=5
fi
END /etc/grub.d/00_header
BEGIN /etc/grub.d/00_tuned
set tuned_params=“”
export tuned_params
set tuned_initrd=“”
export tuned_initrd
END /etc/grub.d/00_tuned
BEGIN /etc/grub.d/01_users
if [ -f ${prefix}/user.cfg ]; then
source ${prefix}/user.cfg
if [ -n “${GRUB2_PASSWORD}” ]; then
set superusers=“root”
export superusers
password_pbkdf2 root ${GRUB2_PASSWORD}
fi
fi
END /etc/grub.d/01_users
BEGIN /etc/grub.d/08_fallback_counting
insmod increment
Check if boot_counter exists and boot_success=0 to activate this behaviour.
if [ -n “${boot_counter}” -a “${boot_success}” = “0” ]; then
if countdown has ended, choose to boot rollback deployment,
i.e. default=1 on OSTree-based systems.
if [ “${boot_counter}” = “0” -o “${boot_counter}” = “-1” ]; then
set default=1
set boot_counter=-1
otherwise decrement boot_counter
else
decrement boot_counter
fi
save_env boot_counter
fi
END /etc/grub.d/08_fallback_counting
BEGIN /etc/grub.d/10_linux
menuentry ‘Ultramarine Linux (6.18.5-100.fc42.x86_64) 42 (Plasma Edition)’ --class ultramarine --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option ‘gnulinux-6.18.5-100.fc42.x86_64-advanced-e7e6a256-af67-45b7-8c67-8b109e34ba1f’ {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root=‘hd3,gpt2’
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd3,gpt2 --hint-efi=hd3,gpt2 --hint-baremetal=ahci3,gpt2 4522d59e-a832-45a4-a0bb-1138c64a9909
else
search --no-floppy --fs-uuid --set=root 4522d59e-a832-45a4-a0bb-1138c64a9909
fi
echo ‘Loading Linux 6.18.5-100.fc42.x86_64 …’
linux /vmlinuz-6.18.5-100.fc42.x86_64 root=UUID=e7e6a256-af67-45b7-8c67-8b109e34ba1f ro rootflags=subvol=root rhgb quiet rd.driver.blacklist=nouveau,nova_core modprobe.blacklist=nouveau,nova_core
echo ‘Loading initial ramdisk …’
initrd /initramfs-6.18.5-100.fc42.x86_64.img
}
menuentry ‘Ultramarine Linux (6.17.7-200.fc42.x86_64) 42 (Plasma Edition)’ --class ultramarine --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option ‘gnulinux-6.17.7-200.fc42.x86_64-advanced-e7e6a256-af67-45b7-8c67-8b109e34ba1f’ {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod ext2
set root=‘hd3,gpt2’
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd3,gpt2 --hint-efi=hd3,gpt2 --hint-baremetal=ahci3,gpt2 4522d59e-a832-45a4-a0bb-1138c64a9909
else
search --no-floppy --fs-uuid --set=root 4522d59e-a832-45a4-a0bb-1138c64a9909
fi
echo ‘Loading Linux 6.17.7-200.fc42.x86_64 …’
linux /vmlinuz-6.17.7-200.fc42.x86_64 root=UUID=e7e6a256-af67-45b7-8c67-8b109e34ba1f ro rootflags=subvol=root rhgb quiet rd.driver.blacklist=nouveau,nova_core modprobe.blacklist=nouveau,nova_core
echo ‘Loading initial ramdisk …’
initrd /initramfs-6.17.7-200.fc42.x86_64.img
}
menuentry ‘Ultramarine Linux (0-rescue-5fe0745918ac49769478b88fd695eb7e) 42 (Plasma Edition)’ --class ultramarine --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option ‘gnulinux-0-rescue-5fe0745918ac49769478b88fd695eb7e-advanced-e7e6a256-af67-45b7-8c67-8b109e34ba1f’ {
load_video
insmod gzio
insmod part_gpt
insmod ext2
set root=‘hd3,gpt2’
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd3,gpt2 --hint-efi=hd3,gpt2 --hint-baremetal=ahci3,gpt2 4522d59e-a832-45a4-a0bb-1138c64a9909
else
search --no-floppy --fs-uuid --set=root 4522d59e-a832-45a4-a0bb-1138c64a9909
fi
echo ‘Loading Linux 0-rescue-5fe0745918ac49769478b88fd695eb7e …’
linux /vmlinuz-0-rescue-5fe0745918ac49769478b88fd695eb7e root=UUID=e7e6a256-af67-45b7-8c67-8b109e34ba1f ro rootflags=subvol=root rhgb quiet rd.driver.blacklist=nouveau,nova_core modprobe.blacklist=nouveau,nova_core
echo ‘Loading initial ramdisk …’
initrd /initramfs-0-rescue-5fe0745918ac49769478b88fd695eb7e.img
}
END /etc/grub.d/10_linux
BEGIN /etc/grub.d/10_reset_boot_success
Hiding the menu is ok if last boot was ok or if this is a first boot attempt to boot the entry
if [ “${boot_success}” = “1” -o “${boot_indeterminate}” = “1” ]; then
set menu_hide_ok=1
else
set menu_hide_ok=0
fi
Reset boot_indeterminate after a successful boot
if [ “${boot_success}” = “1” ] ; then
set boot_indeterminate=0
Avoid boot_indeterminate causing the menu to be hidden more than once
elif [ “${boot_indeterminate}” = “1” ]; then
set boot_indeterminate=2
fi
Reset boot_success for current boot
set boot_success=0
save_env boot_success boot_indeterminate
END /etc/grub.d/10_reset_boot_success
BEGIN /etc/grub.d/12_menu_auto_hide
if [ x$feature_timeout_style = xy ] ; then
if [ “${menu_show_once}” ]; then
unset menu_show_once
save_env menu_show_once
set timeout_style=menu
set timeout=60
elif [ “${menu_auto_hide}” -a “${menu_hide_ok}” = “1” ]; then
set orig_timeout_style=${timeout_style}
set orig_timeout=${timeout}
if [ “${fastboot}” = “1” ]; then
# timeout_style=menu + timeout=0 avoids the countdown code keypress check
set timeout_style=menu
set timeout=0
else
set timeout_style=hidden
set timeout=1
fi
fi
fi
END /etc/grub.d/12_menu_auto_hide
BEGIN /etc/grub.d/14_menu_show_once
if [ x$feature_timeout_style = xy ]; then
if [ “${menu_show_once_timeout}” ]; then
set timeout_style=menu
set timeout=“${menu_show_once_timeout}”
unset menu_show_once_timeout
save_env menu_show_once_timeout
fi
fi
END /etc/grub.d/14_menu_show_once
BEGIN /etc/grub.d/20_linux_xen
END /etc/grub.d/20_linux_xen
BEGIN /etc/grub.d/20_ppc_terminfo
END /etc/grub.d/20_ppc_terminfo
BEGIN /etc/grub.d/25_bli
if [ “$grub_platform” = “efi” ]; then
if [ ! insmod bli ]; then
echo “bli module not available”
fi
fi
END /etc/grub.d/25_bli
BEGIN /etc/grub.d/30_os-prober
menuentry ‘Windows Boot Manager (on /dev/sdb1)’ --class windows --class os $menuentry_id_option ‘osprober-efi-6C7D-51DF’ {
insmod part_gpt
insmod fat
set root=‘hd1,gpt1’
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd1,gpt1 --hint-efi=hd1,gpt1 --hint-baremetal=ahci1,gpt1 6C7D-51DF
else
search --no-floppy --fs-uuid --set=root 6C7D-51DF
fi
chainloader /efi/Microsoft/Boot/bootmgfw.efi
}
Other OS found, undo autohiding of menu unless menu_auto_hide=2
if [ “${orig_timeout_style}” -a “${menu_auto_hide}” != “2” ]; then
set timeout_style=${orig_timeout_style}
set timeout=${orig_timeout}
fi
END /etc/grub.d/30_os-prober
BEGIN /etc/grub.d/30_uefi-firmware
if [ “$grub_platform” = “efi” ]; then
if [ fwsetup --is-supported ]; then
menuentry ‘UEFI Firmware Settings’ $menuentry_id_option ‘uefi-firmware’ {
fwsetup
}
fi
fi
END /etc/grub.d/30_uefi-firmware
BEGIN /etc/grub.d/35_fwupd
END /etc/grub.d/35_fwupd
BEGIN /etc/grub.d/40_custom
This file provides an easy way to add custom menu entries. Simply type the
menu entries you want to add after this comment. Be careful not to change
the ‘exec tail’ line above.
menuentry “Windows 10” {
insmod part_gpt
insmod fat
search --no-floppy --fs-uuid --set=root 6C7D-51DF
chainloader /EFI/Microsoft/Boot/boormgfw.efi
}
END /etc/grub.d/40_custom
BEGIN /etc/grub.d/41_custom
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z “${config_directory}” -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg
fi
END /etc/grub.d/41_custom
