This version of GeoNode has CAS support, follow the below steps to use it in development mode in ubuntu 12.04:

# retrieve latest apt-get list

sudo apt-get update

# Essential build tools and libraries

sudo apt-get install -y build-essential libxml2-dev libxslt1-dev libjpeg-dev gettext git tomcat7

# Python dependencies with official packages

sudo apt-get install -y python-dev python-imaging python-lxml python-pyproj python-shapely python-nose python-httplib2 python-pip python-software-properties python-gdal python-django

#Download and install CAS server

wget http://repo1.maven.org/maven2/org/jasig/cas/cas-server-webapp/3.5.2/cas-server-webapp-3.5.2.war

jar -xvf cas-server-webapp-3.5.2.war

mv cas-server-webapp-3.5.2 /var/lib/tomcat7/webapps

# Java dependencies

sudo apt-get install -y --force-yes openjdk-6-jdk ant maven2 --no-install-recommends

# Clone GeoNode

git clone https://github.com/mishravikas/geonode-cas.git

# Install GeoNode in editable mode

sudo pip install -e geonode-cas

#open settings.py and update field MACHINE_NAME with your full machine name

# Compile GeoServer and create self signed Certificates

paver setup

#Configure tomcat7

open up etc/tomcat7/server.xml with sudo permissions

copy the sample_server.xml file present in the repository into it, and change the fields 'keystoreFile' and 'keystorePass' according to your machine and as used in the previous step.

# Start the development servers

paver start

# Visit the development geonode site

http://localhost:8000

Once fully started, you should see a message indicating the address of your geonode.

So you can login with username and password admin and admin:

Development GeoNode is running at http://localhost:8000/

The GeoNode is an unstoppable machine

Press CTRL-C to shut down

Before starting GeoNode (paver start), you could test your installation by running tests:

paver test

paver test_integration