TCPScan.sh

#!/bin/bash
#Variables
empty=""
#Arguments for the script
while [ "$1" != "" ]; do
 case "$1" in
   -i | --ip )  ip="$2"; shift;;
   -p | --ports )   ports="$2"; shift;;
 esac
 shift
done
#Checking if the -i is empty
if [[ $ip == $empty ]]; then
 echo "Please specify an IP address with -i"
 exit
fi
#checking is -p is empty
if [[ $ports == $empty ]]; then
 echo "Please specify the max port range -p"
 exit
fi
#Scans ports/Dumps closed ports/displays open ports
for i in $(seq 1 $ports); do
 ( echo > /dev/tcp/$ip/$i) > /dev/null 2>&1 && echo $ip":"$i "is open";
done