linux swap flush
#!/bin/bash
free_mem="$(free | grep 'Mem:' | awk '{print $7}')"
used_swap="$(free | grep 'Swap:' | awk '{print $3}')"
echo -e "Free memory:\t$free_mem kB ($((free_mem / 1024)) MiB)\nUsed swap:\t$used_swap kB ($((used_swap / 1024)) MiB)"
if [[ $used_swap -eq 0 ]]; then
echo "No swap is in use."
elif [[ $used_swap -lt $free_mem ]]; then
echo "Freeing swap..."
sudo swapoff -a
sudo swapon -a
else
echo "Not enough free memory. Exiting."
exit 1
fi