How to know PostgreSql is install in Linux system.

Hi,all

l have a very simple question is how can l know the server install
PostgreSQL already?

Because l'm not a root user in my company system , but l need to use
postgresql and php to create the web program,when l use my telnet access
under my account , typing command : rpm -qa|grep postgresql

Then show me --

postgresql-7.0.2-2C1
postgresql-server-7.0.2-2C1
postgresql-devel-7.0.2-2C1
postgresql-test-7.0.2-2C1
postgresql-perl-7.0.2-2C1
postgresql-python-7.0.2-2C1
postgresql-tcl-7.0.2-2C1
postgresql-tk-7.0.2-2C1
postgresql-jdbc-7.0.2-2C1
postgresql-odbc-7.0.2-2C1

Is it mean this version of postgresql is install in the system?
or just have this package in this system , but still not install yet?

Thanks very much.