It is necessary to pay greater attention to the choice of operating system (OS) by the service Virtual Server (thereinafter VPS). The administrator of the VPS is the customer and it is assumed that he has basic experience with an administration of the selected OS. The Provider (FORPSI) is the service solutions operator (HW, connectivity) and has not the right anywise to interfere in a VPS administration. Herewith the VPS differs from the webhosting where the choice of OS is largely determined by the applications which will be operated. The shared webhosting server is managed by the provider (FORPSI) and customer does not need to have knowledge in the OS administration.