Ruby - See if a port is open

Question

I need a quick way to find out if a given port is open with Ruby. I currently am fiddling around with this:

require \'socket\'

def is_port_open?(ip, port)
          


        

Answer 1

I recently came up with this solution, making use of the unix lsof command:

def port_open?(port)
  !system("lsof -i:#{port}", out: '/dev/null')
end