A simple little script to run on macOS to test stability of your internet connection

test-ping.sh

#!/bin/bash

# Set the destination IP or hostname to ping
DESTINATION=8.8.8.9

# Ping the endpoint and write an error to a log file if the ping fails 5 times consecutively
FAILURE_COUNT=0
while true
do
    ping -c 1 -t 1 $DESTINATION > /dev/null 2>&1
    [ $? -eq 0 ] && FAILURE_COUNT=0 || FAILURE_COUNT=$((FAILURE_COUNT + 1))

    if [ $FAILURE_COUNT -eq 5 ]
    then
        DATESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
        echo "${DATESTAMP} Unable to ping ${DESTINATION}" >> "${HOME}/test_ping.log"
        FAILURE_COUNT=0
    fi

    sleep 1
done