Rake task for stopping a rails server when you don't have access to it.

server.rake

# Make a file under: `project_root/lib/tasks/server.rake`

# Then paste the following code

    namespace :server do
      desc "Stop the running server by killing the PID"
      task :kill do
        STDOUT.puts "Enter port number: "
        post_number = STDIN.gets.strip
        system "pid=$(lsof -i:#{post_number.to_i} -t); kill -TERM $pid || kill -KILL $pid"
      end
    end

# Then to use it in the terminal: `rake server:kill`

Hey man my cmd throws an error about the Rakefile. How do I blend this into the rakefile?