sample code from "Working With Unix Processes" $ telnet localhost 3000

preforking_server.rb

require 'socket'

socket = TCPServer.open('0.0.0.0', 3000)

[:INT, :QUIT].each do |signal|
  Signal.trap(signal) {
    wpids.each { |wpid| Process.kill(signal.wpid) }
  }
end

wpids = []

10.times {
  wpids << fork do
    loop {
      connection = socket.accept
      connection.puts "Hello Readers!"
      connection.close
    }
  end
}

Process.waitall