System architecture diagram, Ubuntu, modern office setting, mature man, 30s, short black hair, glasses, casual wear, white shirt, dark blue jeans, sneakers, standing, pointing to a large screen display, complex system architecture illustration, lines and shapes in various colors, Linux logo prominent, server racks in the background, blurred cityscape outside the window, afternoon sunlight, soft box lighting, cinematic composition, 3/4 view, depth of field.