You can use the quick database setup procedure for evaluations and other "light" installations.
You can use the following steps to install PostgreSQL and create the databases you need to evaluate Jive. You'll need to create Core, Activity Engine, and Analytics databases. Use the full database instructions to install your production databases.
For example, type wget http://yum.postgresql.org/9.1/redhat/rhel-5-x86_64/pgdg-centos91-9.1-4.noarch.rpm
For example, type rpm -ivh pgdg-centos91-9.1-4.noarch.rpm
For example, type yum -y install postgresql91-server
For example, type /etc/init.d/postgresql-9.1 initdb
cat <<EOF > /var/lib/pgsql/9.1/data/pg_hba.conf local all all ident host all all <application server IP address>/32 md5 EOF
For example, type /etc/init.d/postgresql-9.1 start
cat <<EOF | su - postgres -c psql create user core with password 'core'; create database core owner core encoding 'UTF-8'; create user eae with password 'eae'; create database eae owner eae encoding 'UTF-8'; create user analytics with password 'analytics'; create database analytics owner analytics encoding 'UTF-8'; EOF