Voici un tuto pour arranger l'interface dégueulasse du bootloader GRUB. Oui, l'illustration est une photo, j'ai la flemme de faire une VM pour ça.

Image un peu plus grande : Lien.

The theme that I suggest is largely inspired by a work, of Gustavo Castro, licensed under a Creative Commons Attribution-ShareAlike 3.0 License. This theme is therefore distributed under the same license.

Configuration is quite quick; Copy and paste variables to modify the grub file (/etc/default/grub) and add the classes to the right place in the files in /etc/grub.d/.



First, clone the git repository:

git clone git@github.com:ysard/grub-breeze-kali-theme.git

You have to put the files in /boot/grub/themes/my_theme. Remember the folder, it will be reused later.

Note that the main wallpaper (kali-wallpaper_1920x1080.png) is quite heavy (4,5Mo), you might want to reduce it.

GRUB configuration

All settings of this part will be in the file /etc/default/grub.

Define the theme

Modify the following variable:


Define the screen resolution

You have to get the maximum resolution supported for your system.

Two solutions:

  • Via the grub console (by pressing 'c' on the OS selection screen)
  • Via this command supposed to give resolutions supported by the framebuffer:

    sudo hwinfo --framebuffer

Then, you have to modify the foolowing variables:


And potentially:

#keep: preserve graphic mode set by GRUB_GFXMODE

Note: If you use CSM Bios (Compatibility Support Module, an emulation of old Bios) for a reason or another, your screen resolution may be much lower than the native resolution.
You can't do much. The quality of Bios implemented in the machines varies widely, and don't rely on manufacturers to provide patches or useful functions for this kind of software.

Define the decoration of the GRUB terminal

This setting can't be configured by the custom theme.
Please note that:

  • An image for the console background should not be transparent.
  • By default there will be black screen.
  • Coordinates of the console are constant and hard-coded.



If you want to set your own image, you will have to convert it:

convert image_example.jpg -resize 1024x768! -depth 16 correct_format.jpg


TL,DR: Icon's name should correspond to some predefined class.

Default classes:

windows > os
gnu-linux > gnu > os
osx > darwin > os
hurd > gnu > os

More important class is on the left. If icon windows.png is found then it will be shown. In this case, the icon os.png will not.

Main system's class (equal to it's name) will be available also. Main system in this case, is the system where update-grub script was called. This class is more important than gnu-linux.

Classes (and current system's class) are readable in /boot/grub/grub.cfg. However, a large amount of icons is already included in the custom theme.

Define icons for submenus & UEFI entries

You will have to edit some files in /etc/grub.d/. These files are used by grub-mkconfig during the generation of grub.cfg.

The files you are interested in are:


The 10_linux file is for linux operating system entries;
The 30_uefi-firmware file is for the uefi setup entry.

First, in 10_linux:

Original line:

echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' \$menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"

Add the ${CLASS} option so that it now looks like this:

echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' ${CLASS} \$menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"

Finally, in 30_uefi-firmware:

Add a class entry, immediately after the export entries at the top of the file:

CLASS="--class recovery"

and add the ${CLASS} option in the menuentry line:

menuentry '$LABEL' ${CLASS} \$menuentry_id_option 'uefi-firmware'

Note: The class entry has to match an icon that is in the theme's icon folder.

/boot/grub/themes/<theme name>/icons/

Commit your changes

You must regenerate the GRUB's menu and commit changes:

grub-mkconfig -o /boot/grub/grub.cfg

Some tricks about the theme


To make fonts for grub, you have to use the following program: grub-mkfont.


For the terminal, the font must be monospaced:

grub-mkfont /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono.ttf -o dejavu_sans_mono.pf2 -v -s 10

The name to use is:
terminal-font: "DejaVu Sans Mono Regular 10"

More examples:

grub-mkfont /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono.ttf -o dejavu_sans_mono_book_12.pf2 -v -s 12
DejaVu Sans Mono Regular 12

grub-mkfont /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono.ttf -o dejavu_sans_mono_book_10.pf2 -v -s 10
DejaVu Sans Mono Regular 10

grub-mkfont /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-Bold.ttf -o dejavu_sans_mono_bold.pf2 -v -s 12
DejaVu Sans Mono Bold 12

grub-mkfont /usr/share/fonts/truetype/sourcecodepro/SourceCodePro-Medium.ttf -o sourcecodepro_medium_12.pf2 -v -s 12
Source Code Pro Regular 12


The following properties are supported by all components:


    The distance from the left border of container to left border of the object in either of three formats:
    x   Value in pixels
    p%  Percentage
    p%+x    mixture of both

    The distance from the left border of container to left border of the object in same format.

    The width of object in same format.

    The height of object in same format.

    The identifier for the component. This can be any arbitrary string. 
    The ID can be used by scripts to refer to various components in the GUI component tree. 
    Currently, there is one special ID value that GRUB recognizes:
    “__timeout__“   Any component with this ID will have its *text*, *start*, *end*, *value*, and *visible* 
    properties set by GRUB when it is counting down to an automatic boot of the default menu entry.