Want to refresh your Ubuntu 16.04 looks? Try this new Papirus Icon Theme, a simply beautiful icon theme for Ubuntu 16.04 and off course for other Linux as well. But here, I will show you how to install Papirus Icon Theme on Ubuntu 16.04. The Papyrus developer now provide a working PPA repository for Ubuntu users. We only need to add this PPA to Ubuntu and install it via Terminal.
Open Terminal and run these commands
sudo add-apt-repository ppa:varlesh-l/papirus-pack sudo apt-get update sudo apt-get install papirus-gtk-icon-theme
Now change the icon theme using Unity Tweak Tool. You may need to install this application first.
sudo apt-get install unity-tweak-tool
You can change the icon theme using Unity Tweak Tool application.