Virtuozzo Containers is a popular virtualization platform, that's used to create virtual servers on physical machines. Each VPS made with it is a standalone software emulation of a website hosting server, therefore it has its own OS. The resources are also fixed, so when you purchase a VPS package with certain disk space, CPU and RAM quotas, they'll always be available and won't be shared with some other customer on the server. The Virtuozzo Containers software is particularly intuitive and easy to use, so even if you do not have much experience, you can control your entire server using a web-based graphical interface. With a couple of clicks, you can start/stop/reboot your virtual machine, set firewall rules, install server-side software programs and perform plenty of maintenance tasks. You may also monitor what amount of resources your websites use in real time and this information can tell you whether you need an upgrade as you expand your web presence. If needed, you are able to even reset the whole VPS to its original software installation.