AllJavi/tartarus-grub

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This should work on any Linux distribution that uses GRUB, but I have only tested it on EndeavourOS and Kali

git clone https://github.com/AllJavi/tartarus-grub.git
cd tartarus-grub
sudo cp tartarus -r /usr/share/grub/themes/
sudo vim /etc/default/grub

Change #GRUB_THEME= to GRUB_THEME="/usr/share/grub/themes/tartarus/theme.txt"

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

If all works correctly you should get this line in the out put:

Found theme: /usr/share/grub/themes/tartarus/theme.txt

When editing the file /etc/default/grub, you also have to comment the line 'GRUB_TERMINAL_OUTPUT="console"

Basic grub theme with material gruvbox style

MIT License