We provide a virtual server service. A virtual server is an emulation of a server, while on one physical machine several such servers can be located and work simultaneously (independently, in isolation from each other). Virtualization technology is required to ensure the separation of hardware into several virtual machines. KVM is one of the technologies built into the Linux kernel. In terms of its technical parameters, KVM is not inferior to other virtualization technologies, but at the same time it is much more convenient for work, so we use KVM on all our virtual servers.