#!/bin/bash
  
while true; do
    flag=$(ps -ef | grep -v grep | grep alloc_page| wc -l)
    if [ "$flag" -eq 0 ]; then
        /alloc_page &
    fi

    sleep 30

    start_time=$(date +%s)
    yum install -y expect > /dev/null 2>&1

    end_time=$(date +%s)

    elapsed_time=$((end_time - start_time))

    echo "$elapsed_time seconds"
    yum remove -y expect > /dev/null 2>&1
done