Ambiance-improved is a theme derived from the Ubuntu Ambiance theme, but with more visual effects. In this guide we will help you install the Ambiance-improved theme on Ubuntu 11.10 (Oneiric Ocelot).
1. Open the terminal (Ctrl+Alt+T) and download and move first the Ambiance-improved theme to the Ubuntu Oneiric "themes" folder using these commands:
tar -xzvf 145869-Ambiance-improved.tar.gz
sudo mv Ambiance-improved /usr/share/themes/
2. Install now the Ambiance-improved theme with this command:
gsettings set org.gnome.desktop.interface gtk-theme 'Ambiance-improved'