Puppet code is an extension of the Ruby scripting language. It is non-procedural. Puppet is a declarative language meaning that instead of writing the steps to perform a task, you declare how you want things to end up and Puppet “takes care” of it.

Error: Could not update: Execution of '/usr/bin/yum -d 0 -e 0 -y downgrade xorg-x11-drv-nvidia-libs-390.30-1.el7.x86_64' returned 1: Error: Package: 1:xorg-x11-drv-nvidia-libs-390.30-1.el7.x86_64 (cuda)
           Requires: xorg-x11-drv-nvidia = 1:390.30-1.el7
           Installed: 1:xorg-x11-drv-nvidia-396.44-1.el7.x86_64 (@cuda)
               xorg-x11-drv-nvidia = 1:396.44-1.el7
           Available: 1:xorg-x11-drv-nvidia-346.46-1.el7.x86_64 (cuda)
               xorg-x11-drv-nvidia = 1:346.46-1.el7