I work in project of geocoding so Ii want to import the OpenStreetMap data. I created a database and name it Nominatim and I tried this command: 

> sudo ./utils/setup.php --osm-file morocco-latest.osm.pbf
--all –osm2pgsql-cache 18000 2>&1 | tee setup.log

It shows me this message:

> CREATE DB 

> ERROR: database already exists ( pgsql : // @/nominatim)

Now when I delete my database Nominatim it shows this error message: 

> ERROR: unable to find /usr/pgsql-9.3/share/contrib/postgis-1.5/postgis.sq

BTW I installed postgres with all the packages. 

Any idea what the issue is?