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

47 votes127 views4 answers
Scikit-learn install error
Shell/Bash
7 votes122 views2 answers
How to view the files in folder linux
Shell/Bash
1 vote139 views2 answers
Vscode add to gitignore
Shell/Bash
14 votes131 views1 answer
Push a local branch
Shell/Bash
1 vote126 views1 answer
Bash how to print the list of files in a directory ls
Shell/Bash
8 votes128 views3 answers
Push a new branch
Shell/Bash
0 vote130 views1 answer
Git ignore clear
Shell/Bash
7 votes144 views2 answers
Create strapi app
Shell/Bash
8 votes120 views1 answer
Styled componets npm
Shell/Bash
0 vote115 views1 answer
Bcrypt fails during docker compose
Shell/Bash