Another way you can customize your VPS to your specific needs is with your choice of Linux operating systems. Select from the best versions of Ubuntu, CentOS, Fedora, Debian, Gentoo or Slackware. If you're in the middle of a project and want change to a different version or a different OS entirely, you can change and re-load your operating system on demand whenever you want!
The force driving server virtualization is similar to that which led to the development of time-sharing and multiprogramming in the past. Although the resources are still shared, as under the time-sharing model, virtualization provides a higher level of security, dependent on the type of virtualization used, as the individual virtual servers are mostly isolated from each other and may run their own full-fledged operating system which can be independently rebooted as a virtual instance.