#!/bin/bash
 
threshold=90 #процентов
total=$(free | grep "Mem:" | awk '{print $2}')
remaining=$(free | grep "Mem:" | awk '{print $4}')
current=$(echo "scale=0;100-$remaining * 100 / $total" | bc -l)
 
if [ $current -gt $threshold ]
then
      /etc/init.d/apache2 stop
      /etc/init.d/apache2 start
 
      echo "Апач был перезапущен в `date +'%Y-%m-%d %H:%M:%S'`."
fi