OS templates are packed container files of a Linux distribution that we can use to quickly install a new container on our node. We can use multiple distributions of Linux on the OpenVZ node. We are not confined to use the same distribution that is installed on the server itself.

You cannot, however, use Windows templates because OpenVZ is an OS-level virtualization technology. The packaged files inside the template files contain everything that is needed to run the container, including boot files, libraries, and system utilities.