pinglog.bash

#!/bin/bash

function usage ()
{
  echo "Usage:"
  echo "    $0 <IP>"
  echo "OR"
  echo "    $0 <IP> | tee mylog.txt"
}

if [ $# -ne 1 ]; then
  usage
  exit 127
fi

IP=$1

while :; do ping -c 1 -W 1 $IP >/dev/null || date; sleep 1; done