A Simple bash script to list all users using finger service on *nix via bruteforce.

brute-finger-listusers.sh

#!/bin/bash

input="/usr/share/metasploit-framework/data/wordlists/unix_users.txt"

if [ "$1" == "" ]; then
    echo "Ennter Host IP."
else
    while IFS= read -r item
    do
        output=$(finger $item@$1)
        if [[ $output != *'no such user'* ]]
        then
            [ ! -z "$item" ] && echo "Found User: $item"
        fi
    done < "$input"
fi