PostgreSQL and CentOS Install example

List what is available in the enabled repositories on your CentOS Install:
yum info postgresql-server.x86_64 | grep Version
Select a newer version form
yum install
# if you are using priorities add some to /etc/yum.repos.d/pgdg-93-centos.repo
yum install postgresql93-contrib
service postgresql-9.3 initdb
service postgresql-9.3 start
Directories of interest are: