Как можно поменять очередность загрузки ОС ?

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"

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 recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; 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
}

if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos4 --hint-efi=hd0,msdos4 --hint-baremetal=ahci0,msdos4 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
else
search --no-floppy --fs-uuid --set=root 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
fi
font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
set locale_dir=$prefix/locale
set lang=ru_UA
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/06_mint_theme ###
set menu_color_normal=white/black
set menu_color_highlight=white/light-gray
### END /etc/grub.d/06_mint_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
set gfxpayload="$1"
if [ "$1" = "keep" ]; then
set vt_handoff=vt.handoff=7
else
set vt_handoff=
fi
}
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Linux Mint 15 MATE 32-bit, 3.8.0-19-generic (/dev/sda4)' --class linuxmint --class gnu-linux --class gnu --class os {
recordfail
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos4 --hint-efi=hd0,msdos4 --hint-baremetal=ahci0,msdos4 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
else
search --no-floppy --fs-uuid --set=root 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
fi
linux /boot/vmlinuz-3.8.0-19-generic root=UUID=640f6a41-a6eb-4f18-bcab-c951a3f1ff54 ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.8.0-19-generic
}
menuentry 'Linux Mint 15 MATE 32-bit, 3.8.0-19-generic (/dev/sda4) -- recovery mode' --class linuxmint --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos4 --hint-efi=hd0,msdos4 --hint-baremetal=ahci0,msdos4 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
else
search --no-floppy --fs-uuid --set=root 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
fi
echo 'Loading Linux 3.8.0-19-generic ...'
linux /boot/vmlinuz-3.8.0-19-generic root=UUID=640f6a41-a6eb-4f18-bcab-c951a3f1ff54 ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.8.0-19-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/10_lupin ###
### END /etc/grub.d/10_lupin ###

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='hd0,msdos4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos4 --hint-efi=hd0,msdos4 --hint-baremetal=ahci0,msdos4 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
else
search --no-floppy --fs-uuid --set=root 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
fi
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='hd0,msdos4'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos4 --hint-efi=hd0,msdos4 --hint-baremetal=ahci0,msdos4 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
else
search --no-floppy --fs-uuid --set=root 640f6a41-a6eb-4f18-bcab-c951a3f1ff54
fi
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Fedora release 19 (Schrödinger’s Cat)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-simple-902bb4af-6a3a-436e-b2c4-007c4a89901b' {
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 902bb4af-6a3a-436e-b2c4-007c4a89901b
else
search --no-floppy --fs-uuid --set=root 902bb4af-6a3a-436e-b2c4-007c4a89901b
fi
linux /boot/vmlinuz-3.9.5-301.fc19.i686 root=UUID=902bb4af-6a3a-436e-b2c4-007c4a89901b ro rd.md=0 rd.lvm=0 rd.dm=0 vconsole.keymap=us rd.luks=0 vconsole.font=latarcyrheb-sun16 rhgb quiet
initrd /boot/initramfs-3.9.5-301.fc19.i686.img
}
submenu 'Advanced options for Fedora release 19 (Schrödinger’s Cat)' $menuentry_id_option 'osprober-gnulinux-advanced-902bb4af-6a3a-436e-b2c4-007c4a89901b' {
menuentry 'RFRemix, with Linux 3.9.5-301.fc19.i686 (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-3.9.5-301.fc19.i686--902bb4af-6a3a-436e-b2c4-007c4a89901b' {
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 902bb4af-6a3a-436e-b2c4-007c4a89901b
else
search --no-floppy --fs-uuid --set=root 902bb4af-6a3a-436e-b2c4-007c4a89901b
fi
linux /boot/vmlinuz-3.9.5-301.fc19.i686 root=UUID=902bb4af-6a3a-436e-b2c4-007c4a89901b ro rd.md=0 rd.lvm=0 rd.dm=0 vconsole.keymap=us rd.luks=0 vconsole.font=latarcyrheb-sun16 rhgb quiet
initrd /boot/initramfs-3.9.5-301.fc19.i686.img
}
menuentry 'RFRemix, with Linux 0-rescue-eb894f403da54d4b98e206546e62df40 (on /dev/sda2)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/boot/vmlinuz-0-rescue-eb894f403da54d4b98e206546e62df40--902bb4af-6a3a-436e-b2c4-007c4a89901b' {
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 902bb4af-6a3a-436e-b2c4-007c4a89901b
else
search --no-floppy --fs-uuid --set=root 902bb4af-6a3a-436e-b2c4-007c4a89901b
fi
linux /boot/vmlinuz-0-rescue-eb894f403da54d4b98e206546e62df40 root=UUID=902bb4af-6a3a-436e-b2c4-007c4a89901b ro rd.md=0 rd.lvm=0 rd.dm=0 vconsole.keymap=us rd.luks=0 vconsole.font=latarcyrheb-sun16 rhgb quiet
initrd /boot/initramfs-0-rescue-eb894f403da54d4b98e206546e62df40.img
}
}

### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
### END /etc/grub.d/30_uefi-firmware ###

### 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.
### 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 ###

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
# info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-93e08823-3a45-4759-9ef4-3dea4ded584c' {
recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 93e08823-3a45-4759-9ef4-3dea4ded584c
else
search --no-floppy --fs-uuid --set=root 93e08823-3a45-4759-9ef4-3dea4ded584c
fi
linux /boot/vmlinuz-3.8.0-27-generic root=UUID=93e08823-3a45-4759-9ef4-3dea4ded584c ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.8.0-27-generic


### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (на /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-F4380EF9380EBA9E' {
insmod part_msdos
insmod ntfs
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 F4380EF9380EBA9E
else
search --no-floppy --fs-uuid --set=root F4380EF9380EBA9E
fi
chainloader +1
}
### END /etc/grub.d/30_os-prober ###

Все исполняемые файлы в этом каталоге, обрабатываются в порядке расширения оболочки.

00_ *: Зарезервировано для 00_header.
10_ *: Записи встроенной загрузки.
20_ *: Сторонних приложений (например, memtest86).

Промежуточное число имен настраивается при загрузке системой и/или администратором. Например, можно добавить записи для загрузки другой ОС как 01_otheros, 11_otheros, и т.д., в зависимости от позиции, которую вы хотите занять в меню; и затем настроить параметр по умолчанию через /etc/default/grub.