Add Virtual Memory on Cloud Server

This guide to add Swap or Virtual Memory on Rackspace Cloud Server is for “increasing” RAM for temporary period – like that, while upgrading a system.Swapping is a terminology which is used for of Computer Hardware System Components, but here the phrase Swap refers to Virtual Memory.
https://thecustomizewindows.com/2014/08/add-swap-virtual-memory-rackspace-cloud-server-ubuntu/