[Spack](https://spack.io) is a package manager to install scientific packages such as [The Multidisciplinary-design Adaptation and Sensitivity Toolkit (MAST)](https://www.mast-multiphysics.com/) or [PNGwriter](https://github.com/pngwriter/pngwriter). This guide explains how to install Spack on an Ubuntu 20.04 Vultr cloud instance. * Deploy a [Vultr Ubuntu 20.04](https://my.vultr.com/deploy) cloud server instance. * Create a sudo user. * [Update the Ubuntu server](https://docs.vultr.com/how-to-up......