A simple little shell script that executes the digital ocean swap file tutorial.

swap.sh

#/bin/sh

if [ -f /swapfile ]; then
	echo "Swap file already exists."
else

	dd if=/dev/zero of=/swapfile bs=1024k count=2000
	chmod 600 /swapfile
	mkswap /swapfile
	swapon /swapfile
	echo "/swapfile    none    swap    sw    0    0" >> /etc/fstab
	sysctl -w vm.swappiness=20
	echo "vm.swappiness=20" >> /etc/sysctl.conf
	free
	echo "Swap created and added to /etc/fstab for boot up."
fi