# Running the SimpleNetworkServerSample program

To run the Derby Network Server sample program, follow these steps.

1. Open a command prompt and change directories to the `%DERBY_HOME%\demo\nserverdemo` directory, where `%DERBY_HOME%` is the directory where you installed Derby.
2. Set the classpath to include the current directory (".") and the following jar files:
   `derbynet.jar`
     The Network Server jar file. It must be in your CLASSPATH because you start the Network Server in this program.
   `derby.jar`
     The database engine jar file.
3. Test the CLASSPATH settings by running the following Java command:

       java org.apache.derby.tools.sysinfo

   This command displays the Derby jar files that are in the classpath.
4. After you set up your environment correctly, run the `SimpleNetworkServerSample` program from the same directory:

       java SimpleNetworkServerSample

   If the program runs successfully, you will receive output that is similar to that shown in the following example:

       Starting Network Server
       Testing if Network Server is up and running!
       Derby Network Server now running
       Got an embedded connection.
       Testing embedded connection by executing a sample query
       number of rows in sys.systables = 16
       While my app is busy with embedded work, ij might connect like this:

               $ java -Dij.user=me -Dij.password=pw -Dij.protocol=
       			jdbc:derby:\\localhost:1527\ org.apache.derby.tools.ij
               ij> connect 'NSSimpleDB';

       Clients can continue to connect:
       Press [Enter] to stop Server

Do not press Enter at this time. Leave the server running while you run the `SimpleNetworkClientSample` program.

Running the `SimpleNetworkServerSample` program also creates the following new directory and file:

`NSSimpleDB`
  This directory makes up the `NSSimpleDB` database.
`derby.log`
  This log file contains Derby progress and error messages.

Parent topic: Network Server sample programs for embedded and client connections
Related concepts
Overview of the SimpleNetworkServerSample program
Connecting a client to the Network Server with the SimpleNetworkClientSample program
Related tasks
Running the SimpleNetworkClientSample program