This option allows user to specify a url prefix for owncloud. By default it is set to "" and the document root will be set to owncloud's dir. If a prefix is set, e.g. urlPrefix = "/owncloud" an alias will be created using that prefix to point to owncloud's dir and owncloud will be available at http://localhost/owncloud
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.