Virtuozzo Containers is a popular virtualization platform, that is used to make virtual servers on physical machines. Each VPS created with it is a separate software emulation of a website hosting server, therefore it has its own OS. The resources are also predefined, thus when you purchase a VPS package with certain disk space, CPU and RAM quotas, they're always at your disposal and won't be shared with another user on the physical server. The Virtuozzo Containers software is truly intuitive and user-friendly, so even if you do not have a lot of experience, you will be able to manage the whole server using a web-based graphical interface. With a couple of clicks, you can start/stop/reboot the virtual machine, set firewall rules, set up server-side software and perform a number of maintenance tasks. You can also watch how much resources your websites are using live and all this info can tell you whether you need an upgrade as you expand your online presence. When needed, you are able to even reset the whole VPS to its original software setup.