Here's how you can install the Aery icons in Ubuntu 13.10 or 13.04.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
sudo add-apt-repository ppa:noobslab/icons
sudo apt-get update
sudo apt-get install aery-icons
The Aery icons were designed for Elementary OS, another Ubuntu spin. However, you can use them in any Linux distribution you want.
Read more: Noobs Lab