 Linux:
 https://wall.alphacoders.com/by_sub_category.php?id=43701&name=Linux+Fondos+de+pantalla&lang=Spanish (re @Axel: gente pasen fondos de escritoriosss)
 General:
 https://unsplash.com/s/photos/wallpaper (re @Rodrigo: Linux:
 https://wall.alphacoders.com/by_sub_category.php?id=43701&name=Linux+Fondos+de+pantalla&lang=Spanish)