/boot/grub/grub.cfg example
example of a /boot/grub/grub.cfg file from MUD (Mint Ubuntu Debian) systems
NOTE: on newer distributions this may be located in /boot/grub2/grub.cfg - that will cause problems if you're using rescue tools.
You can edit this file using the tools listed in the file below, bootloader editing tools on your desktop, or manually as root.
In addition if your system is unbootable you could use Gparted or any LIVE version of Linux to edit these files.
To edit in a LIVE version of Linux you'd do the following:
- boot to the live version (Gparted, SuSE, MINT, etc.)
- open a terminal window (adjust colors from default unless you like a dark background...)
- sudo su -i (you'll likely be in /root - YMMV, check: pwd )
- fdisk -l (note the drives - you want the sector flagged as bootable, or one of the partitions that is used for Linux)
- create a mount point: mkdir a (or fully resolve the path to /root/a IF /root is where you are located in the Live system)
- mount the partition you believe to be the location of grub: mount /dev/sda1 a (note: mount point will likely be /root/a - YMMV)
- once mounted remember your path... the Live system is built in memory and you edit the Live version it'll go away on reboot
- assuming /root/a, cd /root/a/boot/grub HOWEVER - NOTE: at this point your system may have both grub and grub2 directories!!!
- if you have a grub2 that's likely where you'll find grub.cfg - if you use a rescue tool be sure it points there or insmod won't work!
- BEFORE EDITING - cp grub.cfg grub.cfg-`date +'%Y_%m_%d-%b'` - ALWAYS MAKE A COPY OF ANY CONFIG FILE BEFORE EDITING!
#
# 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 $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
#set default="0" # changed default 2015 Aug 06 - also modified timeout to 30 seconds #if I were braver I'd change the colors...
set default="5"
fi
if [ x"${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 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,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 8498124c-4bce-49c4-b0d1-c86eafe5fda3
else
search --no-floppy --fs-uuid --set=root 8498124c-4bce-49c4-b0d1-c86eafe5fda3
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=en_US
insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
set timeout=30
else
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=menu
set timeout=30
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
set timeout=30
fi
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### 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 17.1 MATE 64-bit, 3.13.0-37-generic (/dev/sda6)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
gfxmode $linux_gfx_mode
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 8498124c-4bce-49c4-b0d1-c86eafe5fda3
else
search --no-floppy --fs-uuid --set=root 8498124c-4bce-49c4-b0d1-c86eafe5fda3
fi
linux /boot/vmlinuz-3.13.0-37-generic root=UUID=8498124c-4bce-49c4-b0d1-c86eafe5fda3 ro quiet splash $vt_handoff
initrd /boot/initrd.img-3.13.0-37-generic
}
menuentry 'Linux Mint 17.1 MATE 64-bit, 3.13.0-37-generic (/dev/sda6) -- recovery mode' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 8498124c-4bce-49c4-b0d1-c86eafe5fda3
else
search --no-floppy --fs-uuid --set=root 8498124c-4bce-49c4-b0d1-c86eafe5fda3
fi
echo 'Loading Linux 3.13.0-37-generic ...'
linux /boot/vmlinuz-3.13.0-37-generic root=UUID=8498124c-4bce-49c4-b0d1-c86eafe5fda3 ro recovery nomodeset
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-3.13.0-37-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,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 8498124c-4bce-49c4-b0d1-c86eafe5fda3
else
search --no-floppy --fs-uuid --set=root 8498124c-4bce-49c4-b0d1-c86eafe5fda3
fi
knetbsd /boot/memtest86+.elf
}
menuentry 'Memory test (memtest86+, serial console 115200)' {
insmod part_msdos
insmod ext2
set root='hd0,msdos6'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 8498124c-4bce-49c4-b0d1-c86eafe5fda3
else
search --no-floppy --fs-uuid --set=root 8498124c-4bce-49c4-b0d1-c86eafe5fda3
fi
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows Recovery Environment (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-4C8B-2392' {
insmod part_msdos
insmod fat
set root='hd0,msdos1'
if [ x$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 4C8B-2392
else
search --no-floppy --fs-uuid --set=root 4C8B-2392
fi
parttool ${root} hidden-
drivemap -s (hd0) ${root}
chainloader +1
}
menuentry 'Windows 7 (loader) (on /dev/sda2)' --class windows --class os $menuentry_id_option 'osprober-chain-C8BA8EADBA8E9818' {
insmod part_msdos
insmod ntfs
set root='hd0,msdos2'
if [ x$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 C8BA8EADBA8E9818
else
search --no-floppy --fs-uuid --set=root C8BA8EADBA8E9818
fi
parttool ${root} hidden-
chainloader +1
}
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
set timeout=60
fi
### 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 ###
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