How To Add Swap on Ubuntu

Ubuntu 18.04 https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-18-04

Ubuntu 16.04 https://www.digitalocean.com/community/tutorials/how-to-add-swap-space-on-ubuntu-16-04

Ubuntu 14.04 https://www.digitalocean.com/community/tutorials/how-to-add-swap-on-ubuntu-14-04