Script to create swap partition on Pi

swappartitioncreator.sh

#!/bin/bash

#Creates swap partition on boards with lesser than 3.5GB Memory/RAM

echo ""
echo "Checking memory size.........."
Totalmem=$(cat /proc/meminfo|grep MemTotal|grep -o '[0-9]*')
if (($Totalmem > 3500000)); then
    echo ""
    echo "You have got enough memory. No need for a swap partition.........."
    echo ""
else
    echo ""
    echo "Creating swap partition.........."
    echo ""
    sudo dd if=/dev/zero of=/var/swap2 bs=1024 count=1000000
    sudo chmod 600 /var/swap2
    sudo mkswap /var/swap2
    sudo swapon /var/swap2
    sudo swapon
fi
echo ""