Install gnome-extra-icons by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-extra-icons
Description:
Optional GNOME icons
Optional GNOME icons from http://art.gnome.org/. This package just install a lot of nice icons in /usr/share/pixmaps. Most of them are png files that give you more options to customize your desktop. Also, they can be used in any desktop which supports icons, not only GNOME.
Version: 1.1-3
Section: universe/gnome