<part xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0" xml:id="ch-configuration"> <title>Configuration</title> <partintro> <para>This chapter describes how to configure various aspects of a NixOS machine through the configuration file <filename>/etc/nixos/configuration.nix</filename>. As described in <xref linkend="sec-changing-config" />, changes to this file only take effect after you run <command>nixos-rebuild</command>.</para> </partintro> <xi:include href="config-syntax.xml" /> <xi:include href="package-mgmt.xml" /> <xi:include href="user-mgmt.xml" /> <xi:include href="file-systems.xml" /> <xi:include href="x-windows.xml" /> <xi:include href="networking.xml" /> <xi:include href="linux-kernel.xml" /> <!-- FIXME: auto-include NixOS module docs --> <xi:include href="postgresql.xml" /> <!-- Apache; libvirtd virtualisation --> </part>