SWAP cleanup

#!/bin/bash
clear
echo ""
echo ""
echo ""
echo "Checking if Swap is in use..."
echo "If Swap is in use, i will clear up RAM_Cache,"
echo "and free up Swap space..."
echo ""
echo ""
free_data="$(free)"
mem_data="$(echo "$free_data" | grep 'Mem:')"
free_mem="$(echo "$mem_data" | awk '{print $4}')"
buffers="$(echo "$mem_data" | awk '{print $6}')"
cache="$(echo "$mem_data" | awk '{print $7}')"
total_free=$((free_mem + buffers + cache))
used_swap="$(echo "$free_data" | grep 'Swap:' | awk '{print $3}')"
echo -e "Free memory:\t$total_free kB ($((total_free / 1024)) MB)\nUsed swap:\t$used_swap kB ($((used_swap / 1024)) MB)"
if [[ $used_swap -eq 0 ]]; then
echo ""
echo ""
echo "No swap is in use.  :)"
echo "Nothing to do, exiting..."
elif [[ $used_swap -lt $total_free ]]; then
printf '\n%s\n' 'Freeing PageCache, dentries and inodes, Ram-cache and Swap'
sync; echo 3 > /proc/sys/vm/drop_caches
swapoff -a
swapon -a
echo "everything is cleared..."
else
echo "Not enough free memory. Exiting."
exit 1
fi