This tutorial will show you how to install Plank 0.10 on Xubuntu 15.10 Willy Werewolf. Plank is a simple dock for Linux system. Installing Plank on Ubuntu based Linux is very easy since there is a PPA repository for Plank.
To install Plank, first add the PPA repository. You can do this via Terminal with this single command
sudo add-apt-repository ppa:ricotz/docky
Update system
sudo apt-get update
Install Plank
sudo apt-get install plank
Done. Now run Plank via application menu.