to run geodjango in ubuntu (10.04 tested)

geodjango: ubuntu: postgresql 9 - postgis 1.5

sudo apt-get update
sudo apt-get install python-software-properties

sudo add-apt-repository ppa:pitti/postgresql
sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable
sudo apt-get update

sudo apt-get install -y postgresql-9.0 postgresql-server-dev-9.0 postgresql-contrib-9.0 proj libgeos-3.2.2 libgeos-c1 libgeos-dev libgdal1-1.7.0 libgdal1-dev build-essential libxml2 libxml2-dev checkinstall

psql --version

rm -rf /usr/bin/pg_config && ln -s /usr/lib/postgresql/9.0/bin/pg_config /usr/bin/pg_config
pg_dropcluster --stop 9.0 main
pg_createcluster --start -e UTF8 9.0 main

wget http://postgis.refractions.net/download/postgis-1.5.2.tar.gz
tar zxvf postgis-1.5.2.tar.gz && cd postgis-1.5.2/
sudo ./configure && sudo make && sudo checkinstall --pkgname postgis-1.5.2 --pkgversion 1.5.2-src --default
dpkg -i postgis-1.5.2_1.5.2-src-1_amd64.deb 

sudo su - postgres
POSTGIS_SQL_PATH=`pg_config --sharedir`/contrib/postgis-1.5
createdb -E UTF8 template_postgis
createlang -d template_postgis plpgsql
psql -d postgres -c "UPDATE pg_database SET datistemplate='true' WHERE datname='template_postgis';"
psql -d template_postgis -f $POSTGIS_SQL_PATH/postgis.sql
psql -d template_postgis -f $POSTGIS_SQL_PATH/spatial_ref_sys.sql
psql -d template_postgis -c "GRANT ALL ON geometry_columns TO PUBLIC;"
psql -d template_postgis -c "GRANT ALL ON geography_columns TO PUBLIC;"
psql -d template_postgis -c "GRANT ALL ON spatial_ref_sys TO PUBLIC;"

createdb -T template_postgis dbname_dev

createuser --createdb -P <username>