1.在ubuntu-tweak里面找到Cairo-Dock然后安装

2.sudo gedit /etc/apt/sources.list
然后在里面加入
deb http://repository.glx-dock.org/ubuntu lucid cairo-dock # For Ubuntu 10.04

deb http://repository.glx-dock.org/ubuntu karmic cairo-dock # For Ubuntu 9.10

deb http://repository.glx-dock.org/ubuntu jaunty cairo-dock # For Ubuntu 9.04

deb http://repository.glx-dock.org/ubuntu intrepid cairo-dock # For Ubuntu 8.10

deb http://repository.glx-dock.org/ubuntu hardy cairo-dock # For ubuntu 8.04

看自己版本需求，然后保存。

sudo apt-get update
sudo apt-get install cairo-dock cairo-dock-plug-ins

10.10 安装方法：

sudo add-apt-repository ppa:cairo-dock-team/ppa
sudo apt-get update  


sudo apt-get install cairo-dock cairo-dock-plug-ins