How do I change the wallpaper through the command line?

Question

Is there any DConf/Gsettings etc. interface for changing the wallpaper through the command line?

Answer 1

Thanks to the Set Wallpaper Contract there already is a convenient way to set a new wallpaper: set-wallpaper

Example:

set-wallpaper ~/Downloads/coolpicture.png

---

set-wallpaper some-name.png will set as wallpaper the file ~/some-name.png.

If there is no such file at that location, it will create a black desktop: for example a command like set-wallpaper x.