VPS (Virtual Private Server) technology is a service for hosting websites or corporate portals. A virtual server completely emulates a physical server, but it is easier to maintain and much cheaper. Unlike virtual hosting, VPS users enjoy full access to the disk space and server resources allocated to them. The users can independently install any software on the server, add or remove files, run scripts, assign permissions, etc. There are several virtual dedicated servers on the same physical virtualization server, but being located in a completely isolated environment they neither interfere with each other nor use other users' resources.