First script, installs the SDR rtl on the Pi, see webpage below for more info. Should also work on Ubuntu.

install_sdr_pi.sh

#!/bin/bash
#from http://zr6aic.blogspot.com.au/2013/02/setting-up-my-raspberry-pi-as-sdr-server.html

#install software packages
sudo apt-get update
sudo apt-get -y install cmake libusb-1.0-0.dev build-essential git

#Now install the RTL-2832U USB dongle driver src and compile

cd
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr/
mkdir build
cd build
cmake ../
make
sudo make install
sudo ldconfig
sudo rtl_test -t
echo "see webpage for next steps as you might need to setup the blacklist"
echo "http://zr6aic.blogspot.com.au/2013/02/setting-up-my-raspberry-pi-as-sdr-server.html"