Install gfxboot-themes by entering the following commands in the terminal:
sudo apt update sudo apt install gfxboot-themes
Description:
tool to test and create graphical boot logos (themes)
gfxboot is a tool to test and create graphical boot logos for gfxboot compliant boot loaders. Currently, this includes grub, lilo, and syslinux (all payloads). . This package contains full featured themes (KDE, openSUSE, SLED, SLES, and upstream).
Homepage: http://gfxboot.sourceforge.net/
Version: 4.5.2-1.1-5build1
Section: universe/misc