For pinging things connected to the ethernet at port eno1 of the device you are using.

pingarper.sh

#!/bin/bash

declare -A devices

devices["name"]="MAC_address"

for i in "${!devices[@]}"
do
  #echo "key:     $i"
  #echo "value:   ${devices[$i]}"
  arp=$(sudo arp-scan --interface=eno1 --local | grep ${devices[$i]})
  arp_arr=( $arp )
  if [ "$i" = "nuc1" ]; then
    ip=$(/sbin/ifconfig eno1 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}')
    echo "${ip}       $i"
  else
    echo "${arp_arr[0]}       $i"
  fi
done

for i in "${!devices[@]}"
do
  arp=$(sudo arp-scan --interface=eno1 --local | grep ${devices[$i]})
  arp_arr=( $arp )
  #echo "$i      ${devices[$i]}      ${arp_arr[0]}"
  if [ "$i" = "nuc1" ]; then
    ip=$(/sbin/ifconfig eno1 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}')
    echo "$i     ${devices[$i]}      ${ip}"
  else
    echo "$i        ${devices[$i]}      ${arp_arr[0]}"
  fi
done