Zinc can be run in a simple headless server mode (i.e. without a graphical user interface). This allows you to run a Zinc server on a computer that does not have a graphical display - a typical UNIX server for example.
The way you start Zinc from the command line will depend on your operating system. In UNIX you can start the server with the command zinc -headless. In Windows you must open a command prompt and change to the directory where you installed Zinc. You can then use the headless.bat command to start the headless server.