Transfer swapped data back to RAM

swap-to-ram.bash

#!/usr/bin/env bash
###################

mem=$(LC_ALL=C free  | awk '/Mem:/ {print $4}')
swap=$(LC_ALL=C free | awk '/Swap:/ {print $3}')

if [ "$EUID" -ne 0 ]; then
    echo "ERROR: Not running as root. Nothing done." >&2
    exit 1
fi

if [ $mem -lt $swap ]; then
    echo "ERROR: Not enough RAM to write swap back. Nothing done." >&2
    exit 2
fi

echo -e "Moving swapped data to RAM\033[5m...\033[0m"
swapoff -a &&
swapon -a
echo "Done."

exit 0