Hello Linux Geeksters. As you may know, Cairo-Dock is a fast and lightweight desktop interface that takes the shape of docks, docklets and panels, providing a good alternative to Unity, Gnome-Shell, XFCE-panel, KDE-panel or LXDE-panel and has support for Zeitgeist, Logind/Systemd, Desktop Notifications, DisplayManager, Compiz, Cinnamon, Gnome Shell, and Kernel stats from /proc, among others.

The latest version available is Cairo-Dock 3.3.99 Beta 1, which has been released a while ago, bringing Wayland support.
In this article I will show you how to install Cairo Dock 3.3.99 Beta 1 on Ubuntu 14.04 Trusty Tahr, Linux Mint 17 Qiana, Pinguy OS 14.04, Elementary OS 0.3 Freya, Peppermint Five, Deepin 2014, LXLE 14.04, Linux Lite 2.0 and other Ubuntu 14.04 derivative systems.
Because it is available via PPA installing Cairo Dock 3.3.99 Beta 1 on Ubuntu 14.04 and derivative systems is easy. All you have to do is add the ppa to your system, update the local repository index and install the cairo-dock and cairo-dock-plug-ins packages. Like this:
$ sudo add-apt-repository ppa:cairo-dock-team/ppa
$ sudo apt-get update
$ sudo apt-get install cairo-dock cairo-dock-plug-ins
Optional, to remove cairo-dock and cairo-dock-plug-ins, do:
$ sudo apt-get remove cairo-dock cairo-dock-plug-ins