If you have a RedHat/CentOS/OracleLinux distro of Linux, then yum should be available as your package manager. Here are the notes I have to get PostgreSQL server up running.
bash> yum info postgresql-server
bash> # Verify that's the version you want to install
bash> # Ready to install
bash> sudo su -
bash> yum -y install postgresql-server
bash> service postgresql initdb
bash> # Startup the server manually
bash> service postgresql start
bash> # Make server startup at system reboot
bash> chkconfig postgresql on
bash> # Verify postgres DB is working
bash> su - postgres -c psql
postgres=# \du
postgres=# \q
bash> # We are done, exit root user shell
bash> exit
If you can't find service or chkconfig commands, then check to ensure you have have /sbin in your $PATH.
