Installation and management of GnomeShell themes in Ubuntu12.10

In Ubuntu12.10, how does one install and manage GnomeShell topics? First install GnomeTweakTool in Ubuntu12.10. ShellTh in the topic of TweakTool

In Ubuntu 12.10, how does one install and manage Gnome Shell themes? First install Gnome Tweak Tool in Ubuntu 12.10 see http://www.linuxidc.com/Linux/2012-11/73624.htm

After installation, the Shell extension of the Tweak Tool is still blank.

The Shell Theme in the Theme of the Tweak Tool is an exclamation point and cannot be selected.

In this case, we need to install User Theme Extension. User Theme Extension can be installed through the following PPA.

Sudo add-apt-repository ppa: satyajit-happy/themes

Sudo apt-get update

Sudo apt-get install gnome-shell-extensions