ubuntu 20.04 how to setting the background omage from the terminal command line code example

Example 1: gnome set wallpaper command line

#To get directory of background iamge
$ gsettings get org.gnome.desktop.background picture-uri
'file:///usr/share/backgrounds/warty-final-ubuntu.png'

Example 2: gnome set wallpaper command line

$ gsettings get org.gnome.desktop.background picture-uri
'file:///usr/share/backgrounds/warty-final-ubuntu.png'