peter@peter-laptop:~/mapnik$ sudo -u postgres osm2pgsql -n -d gis Test.osm
osm2pgsql SVN version 0.70.5

Using projection SRS 900913 (Spherical Mercator)
Setting up table: planet_osm_point
NOTICE:  table "planet_osm_point" does not exist, skipping
NOTICE:  table "planet_osm_point_tmp" does not exist, skipping
Setting up table: planet_osm_line
NOTICE:  table "planet_osm_line" does not exist, skipping
NOTICE:  table "planet_osm_line_tmp" does not exist, skipping
Setting up table: planet_osm_polygon
NOTICE:  table "planet_osm_polygon" does not exist, skipping
NOTICE:  table "planet_osm_polygon_tmp" does not exist, skipping
Setting up table: planet_osm_roads
NOTICE:  table "planet_osm_roads" does not exist, skipping
NOTICE:  table "planet_osm_roads_tmp" does not exist, skipping
Mid: Ram, scale=100

!! You are running this on 32bit system, so at most
!! 3GB of RAM can be used. If you encounter unexpected
!! exceptions during import, you should try running in slim
!! mode using parameter -s.

Reading in file: gis
error while opening file gis