VServer is use to create a virtual private server (VPS). Sukrit Dhandhania show us how to build VPS quickly with VServer.
FTA "...BSD users can improve system security with that operating system's jail mechanism, which creates a partition of resources, thereby creating a logical barrier between services running inside different such jails. Under Linux, an application called Linux-VServer implements pretty much the same functionality. It partitions a system's resources -- namely CPU, memory, hard disk, and network -- so that processes inside of the partitions are limited to their context, which makes denial of service attacks less likely to succeed. This is one reason why many hosting companies use virtual servers...
Linux-VServer allows you to create virtual private servers and security contexts, which operate like normal Linux servers but allow many independent servers to be run simultaneously in one box at full speed. It utilizes operating system-level virtualization to enable the kernel to partition resources...".
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You can also use XEN or VMWARE server (free version) for same purpose :)
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