Use the commands below to create swap file on a micro instance with a Linux operating system. This creates a 2GB Swap file to help alleviate low system ram. Consequently, this is great for those using micro instances in the cloud that have under 1 GB of memory.
Run the following from your SSH window
sudo fallocate -l 2G /swapfile sudo chmod 600 /swapfile sudo mkswap /swapfile sudo swapon /swapfile sudo swapon -s`
then change fstab (/etc/fstab) so it automatically mounts your swap file on startup
/swapfile none swap sw 0 0
Afterward, check if your swap file is operating properly with