Follow these setup to run the quick start example:

1. Get the code:

   $ go get google.golang.org/grpc/examples/helloworld/greeter_client
   $ go get google.golang.org/grpc/examples/helloworld/greeter_server

2. Run the server:

   $ $(go env GOPATH)/bin/greeter_server &

3. Run the client:

   $ $(go env GOPATH)/bin/greeter_client
   Greeting: Hello world

For more details (including instructions for making a small change to the example code) or if you're having trouble running this example, see Quick Start.