···19192020<para>The default Linux kernel configuration should be fine for most users. You can see the configuration of your current kernel with the following command:
2121<programlisting>
2222-cat /proc/config.gz | gunzip
2222+zcat /proc/config.gz
2323</programlisting>
2424If you want to change the kernel configuration, you can use the
2525<option>packageOverrides</option> feature (see <xref
···77<title>Option Declarations</title>
8899<para>An option declaration specifies the name, type and description
1010-of a NixOS configuration option. It is illegal to define an option
1111-that hasn’t been declared in any module. A option declaration
1010+of a NixOS configuration option. It is invalid to define an option
1111+that hasn’t been declared in any module. An option declaration
1212generally looks like this:
13131414<programlisting>
···4242 <listitem>
4343 <para>The default value used if no value is defined by any
4444 module. A default is not required; in that case, if the option
4545- value is ever used, an error will be thrown.</para>
4545+ value is never used, an error will be thrown.</para>
4646 </listitem>
4747 </varlistentry>
4848