Want More Wallpapers in Ubuntu? Install GNOME Backgrounds
Ubuntu 23.04 comes with a small selection of (largely lobster themed) wallpapers out of the box. The choice is neither vast nor varied so you may find yourself looking for some additional ones to liven up your desktop.
Well, one fast and easy way to quickly add more high-quality wallpapers to Ubuntu is to install the gnome-backgrounds package. This is available in the Ubuntu repos, though you’ll need to install it using the command line as Ubuntu Software doesn’t show a result for it).
This package contains the “official” GNOME wallpaper which you’ll have seen in blog posts, videos, and screenshots recently. I absolutely love it. I think it is one of the best “default” wallpapers of any OS, Linux or otherwise. It’s neutral without being bland; and visually interesting without being distracting.