Uninstall postgresql 9.2 on red hat linux

Hi
I am new to postgresql. I have postgresql 9.2 installed on Red hat linux 6.4
I accidentally deleted data directory this morning (/var/lib/postgresql/9.2/data)

I tried to start posgresql 9.2 service
"service postgresql-9.2 start"

I got a message to initialize the db first.

so I ran "service postgresql-9.2 initdb"

This was successful.

Then I tried "service postgresql-9.2 start"
This failed.

pgstartup.log indicated I can start the database server using:
    /usr/pgsql-9.2/bin/postgres -D /var/lib/pgsql/9.2/data
or
    /usr/pgsql-9.2/bin/pg_ctl -D /var/lib/pgsql/9.2/data -l logfile start

However I  am unable to start the service as root.

That is the only account I use on this server. I am not aware of any other account on this server.
I tried  su - postgres
and then from the bash shell I tried to run these commands (tried one at a time)
but I got the message  that address was in use. There are no processes running on 5432.

How can I start postgres service?

Thanks,
TG