1. go tohttps://www.postgresql.org/download/linux/redhat/

2. select version to be installed.

3.Install the repository RPM

4.Install the client packages

5.Optionally install the server packages

6.Optionally initialize the database and enable automatic start

7.service postgresql-version initdb

8.chkconfig postgresql-version on

9.change password

10. configure postgresql

11. open port 5432