Scan for unused ports linux

#!/bin/bash
IP=$1
first_port=$2
last_port=$3
function scanner

{
for ((port=$first_port; port<=$last_port; port++))
        do
                (echo >/dev/tcp/$IP/$port)> /dev/null 2>&1 && echo $port open || echo "$port closed"
        done
}

scanner

Source: superuser.com

Similar codes

2 votes232 views2 answers
How to remove all uncommitted changes in git
Shell/Bash
3 votes251 views2 answers
Linux date command live update
Shell/Bash
0 vote238 views1 answer
Create and run docker registry
Shell/Bash
3 votes239 views6 answers
Poop
Shell/Bash
0 vote258 views1 answer
Git commit no pre commit
Shell/Bash
0 vote245 views1 answer
Php mysqldump terminal
Shell/Bash
3 votes233 views1 answer
Invalid command bdist_wheel
Shell/Bash
20 votes247 views3 answers
Git clone with folder name
Shell/Bash
0 vote225 views1 answer
Curl put file
Shell/Bash
1 vote247 views1 answer
Install x centos 7
Shell/Bash