def output_command(command_string)
      $stdout.puts
      $stdout.puts StringMasker.new(command_string, :username => username, :password => password).to_s
    end
def output_command(command_string)
      $stdout.puts
      $stdout.puts StringMasker.new(command_string, :username => username, :password => password).to_s
    end
print the command on the screen