You can test if MapServer is working by running the MapServer executable (mapserv) with the -v parameter on the command line (./mapserv -v). Depending on your configuration, the output could be something like this:
MapServer version 6.0.1 OUTPUT=GIF OUTPUT=PNG
OUTPUT=JPEG SUPPORTS=PROJ SUPPORTS=AGG
SUPPORTS=FREETYPE SUPPORTS=ICONV SUPPORTS=WMS_SERVER
INPUT=SHAPEFILE
You can also send a HTTP request directly to the MapServer CGI program without passing any configuration variables (e.g. http://localhost/cgi-bin/mapserv.exe). If you receive the message,
‘No query information to decode. QUERY_STRING not set.’,
your installation is working.