Virtuozzo Containers is software, which is used to create virtual servers on a physical hosting server. It allows VPS accounts to be set up and managed independently of each other, so each of them can have its own OS plus a fixed and warranted amount of system resources, for instance CPU time, disk space, physical memory, etc. You are able to start, stop or restart the server, to install various software packages, to perform a variety of maintenance tasks, to create firewall rules and even to reboot the entire hosting server to its initial state through a very intuitive web interface. You can also keep an eye on the used and the available resources and on the running processes, to have an idea if the eventual development of your sites will require a package upgrade as well. Virtuozzo gives you complete control over your VPS and you're able to control everything easily, even when you do not have a lot of experience.