Scan local network and show hostname, IP, MAC address, brand

scan-network.sh

#!/bin/sh

if (( $# != 1 )); then
    >&2 echo "Usage: $0 NETWORK_INTERFACE"
    exit 1
fi

sudo arp-scan -gx --localnet -I $1 |
  awk '{
    l=""
    "avahi-resolve -a " $1 " 2>/dev/null" | getline l
    split(l, a, " ")
    a[1]=="Failed" ? hn="" : hn=a[2]
    print hn "\t" $0
  }' | column -ts $'\t'