Guarda log do horário que o ping ao host falha

ping_monitor.sh

#/bin/sh

host=$1
log_path=$2

if [ ! -f $log_path ]; then
    touch $log_path
fi

store_fail() {
    date +"%Y-%m-%d %H:%I:%S" >> $1
}

while true; do
    if ! ping -c 1 -W 1 $host &> /dev/null; then
      store_fail $log_path
    fi
    sleep 1
done