scanhosts.sh

#!/bin/bash

trap 'exit' INT

red="$1"
base=$(echo "$red" | cut -d'.' -f1-3)

for ip in $(seq 1 254); do
    host="$base.$ip"

    if ping -c 1 -W 1 "$host" > /dev/null 2>&1; then
        echo "$host ONLINE"
    else
        echo "$host OFFLINE"
    fi
done