notes/docs/home-network/admin/monitoring.md

Network monitoring

Discover all devices connected to the local network:

#!/bin/bash
subnet="192.168.0"
for suffix in $(seq 101 199); do
    ip_address="$subnet.$suffix"
    # Only wait 1 second for each response: ping should only take a few
    # milliseconds on LAN.
    ping -c 1 -W 1 $ip_address | grep "64 bytes from $ip_address" | awk '{ print $4 }' | sed s/://
done