https://wiki.debian.org/es/LightDM#Cambiar_el_fondo_de_la_recepci.2BAPM-n
https://help.ubuntu.com/community/Grub2/Displays sds o/
https://wiki.debian.org/es/LightDM#Cambiar_el_fondo_de_la_recepci.2BAPM-n
https://help.ubuntu.com/community/Grub2/Displays sds o/