sudo swapon --show
sudo dd if=/dev/zero of=/swapfile bs=1024 count=512k
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo cp /etc/fstab /etc/fstab.bak
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
sudo swapon --show
free -h
cat /dev/null > ~/.bash_history && history -c && exit