debain ping domains parallel

ping.sh

#!/bin/bash

response=$(ping -c 2 $1 | tail -1| awk '{print $4}' | cut -d '/' -f 3) 
echo "$1 = $response"

run_parallel.sh

#!/bin/bash

for cmd in "$@"; do {
  $cmd & pid=$!
  PID_LIST+=" $pid";
} done

trap "kill $PID_LIST" SIGINT

wait $PID_LIST

# ./run_parallel.sh './ping.sh host_1' './ping.sh host_2' ... './ping.sh host_n'