Brand New User (I hope)

Hello,

I've just purchased SuSE 9.1 Professional which uses the YaST package manager
to install software and was wondering if anyone has successfully installed
Postgresql 7.4.2-31 on a Pentium based machine. I installed all of the
postgresql packages and simply ended up with a "server not found" message
when I typed: createdb mydata.  I've never asked a user group for help before
so I'm not sure how to go about this.......

Thank-you,
Phil