Record highest amount of ram (in bytes) used at once on a system

maxmem.sh

#!/bin/bash

maxRAM=0
prevMax=0
while [ 1 == 1 ]; do
  initRAM=`free | grep "Mem:" | awk '{print$3}'`
  freeRAM=`free | grep "Mem:" | awk '{print$3}'`
  if [ $freeRAM -ge $initRAM ]; then 
    prevMAX=$freeRAM
    if [ $freeRAM -ge $maxRAM ]; then
    maxRAM=$freeRAM
      if [ $maxRAM -ge $prevMax ]; then
        clear && echo "Maximum: $maxRAM"
      fi
    fi
  fi
done