Check for the Internet connection

internet.sh

#!/bin/bash
# Usage: HOST=public_gateway_ip_here ./internet.sh
CONNECTED=30
DISCONNECTED=0
INTERVAL=$DISCONNECTED

while sleep $INTERVAL
do
  LOSS=$(ping -c 10 -s 14 $HOST|grep packet|awk '{print $7}'|cut -d'.' -f1)
  echo "$LOSS packets lost"
  if [ 50 -ge $LOSS ]
  then
    if [ $DISCONNECTED -eq $INTERVAL ]
    then
      say "Internet Connected"
      INTERVAL=$CONNECTED
    fi
  else
    if [ $CONNECTED -eq $INTERVAL ]
    then
      say "Internet Lost"
      INTERVAL=$DISCONNECTED
    fi
  fi
done