You can add VPS Templates from your user control panel. VPS template is a predefined set of RPMs to install/remove/upgrade a certain service, tool or application. You can install application (e.g dns-server, ftp-server) and extra Parallels H-Sphere VPS templates. Extra VPS template is a custom set of RPMs provided depending on your OS.
You can add Parallels H-Sphere VPS Templates in your Control Panel:
Note: Prior to installing Custom templates, make sure to add them at the bottom of the VPS Templates page.
You can update Parallels H-Sphere VPS Core templates, which are the basic services, libraries, and tools of Parallels H-Sphere VPS. For this, go to Virtual Private Server>VPS Templates and find the Update icon in the Controls column.