create a tcp server on a specific port in ruby

To create a TCP server in Ruby, you first need to require the socket library. Then, you can create a new TCP server using the TCPServer.new() method, specifying the port number on which you want to listen for incoming connections.

Here's an example of how to create a TCP server on port 3000:

main.rb
require 'socket'

server = TCPServer.new(3000)

loop do
  client = server.accept

  # do something with the client connection
end
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In this example, the server variable holds the new TCP server listening on port 3000. The loop statement will continuously accept incoming connections and assign them to a new client variable.

You can then use the client connection to send and receive data from the connected client.