I'm curious about this parameter, all I know you can set any name with echo
and it's displays the name that I set there in the grub2 menu. But I'm curious why does it change back to purple background when I restore the previous value
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
where is that setting defined? is it in grub.cfg? or is in some of the files in grub.d folder?