Add a swap to EC2 micro instance!

Those 640MB RAM in a micro instance will not get you far.. but sometimes for the sake of testing – you might want to enable swap.

Here is a fast how to create a swap as a file..

sudo dd if=/dev/zero of=/var/swapfile bs=1M count=2048 
sudo chmod 600 /var/swapfile 
sudo mkswap /var/swapfile
echo /var/swapfile none swap defaults 0 0 | sudo tee -a /etc/fstab 
sudo swapon -a