#!/bin/sh
[ -e /swap ] && {
	# for saftey
	swapoff /swap
	rm /swap
	sed -Ei '/\/swap\s*/d' /etc/fstab
}

touch /swap
size="$(( "$(free -g | awk '/Mem:/ {print $2}')" + 1 ))k"
dd if=/dev/zero of=/swap bs=1M count="$size" status=progress
chmod 0600 /swap
mkswap -U clear /swap
swapon /swap
echo '' >> /etc/fstab
echo '/swap none swap defaults 0 0' >> /etc/fstab
echo "Created $(echo $size | tr -d 'k') Gb swap file"