El post se hara con el nuevo ubutu que es 15.10 o que tambien funciona en debian 8.2 , Prosigamos
Abren una shell
CTRL+ALT+T
Escriban lo siguiente
sudo add-apt-repository ppa:numix/ppa
Output de Repository
sudo add-apt-repository ppa:numix/ppa
The official PPA for the Numix Project - http://numixproject.org
The PPA consists of various artwork packages from the Numix Project.
More info: https://launchpad.net/~numix/+archive/ubuntu/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring `/tmp/tmp2m3pfsov/secring.gpg' created
gpg: keyring `/tmp/tmp2m3pfsov/pubring.gpg' created
gpg: requesting key 0F164EEB from hkp server keyserver.ubuntu.com
gpg: /tmp/tmp2m3pfsov/trustdb.gpg: trustdb created
gpg: key 0F164EEB: public key "Launchpad PPA for Numix Maintainers" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
sudo apt-get update
sudo apt-get install numix-gtk-theme numix-icon-theme-circle
sudo apt-get install numix-wallpaper-notd
Si tienes instalado debian y no tiene el softwares-properties-common
Ejecutas lo siguiente.
Wheezy
sudo apt-get install python-software-properties
Jessie
sudo apt-get install software-properties-common
De tener instalado y agregar los repositorios instalaremos ubuntu tweak tool para poder cambiar el tema eh iconos
sudo apt-get install unity-tweak-tool
Como setear los themes eh icons
(http://gamblisfx.com/wp-content/uploads/2014/04/unity-tweak-tool.jpg)
(http://gamblisfx.com/wp-content/uploads/2014/04/numix-ubuntu.jpg)
Nota: Recuerden instalar en debian los paquetes para que puedan agregar el respositorio