check-nmap-ports.sh

#!/bin/sh
set -eu

usage() {
  echo "Usage: ${0##*/} <-sT/-sU> <number of ports>"
}

if [ "$1" = "-h" ]; then
  usage
  exit 0
fi

scan_type=$1
ports=$2
sudo nmap ${scan_type} --top-ports ${ports} -v -oG - | grep '# Ports scanned'