+ <term><option>-h</option></term>
+ <term><option>--help</option></term>
+ <listitem>
+ <para>Print help text.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect2>
+
+ <refsect2><title>udevadm hwdb
+ <arg choice="opt"><replaceable>options</replaceable></arg>
+ </title>
+ <para>Maintain the hardware database index in <filename>/etc/udev/hwdb.bin</filename>.</para>
+ <variablelist>
+ <varlistentry>
+ <term><option>-u</option></term>
+ <term><option>--update</option></term>
+ <listitem>
+ <para>Compile the hardware database information located in /usr/lib/udev/hwdb.d/,
+ /etc/udev/hwdb.d/ and store it in <filename>/etc/udev/hwdb.bin</filename>. This should be done after
+ any update to the source files; it will not be called automatically. The running
+ udev daemon will detect a new database on its own and does not need to be
+ notified about it.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--usr</option></term>
+ <listitem>
+ <para>Put the compiled database into <filename>/usr/lib/udev/hwdb.bin</filename> instead.
+ Use this if you want to ship a pre-compiled database in immutable system images, or
+ don't use <filename>/etc/udev/hwdb.d</filename> and want to avoid large binary files in
+ <filename>/etc</filename>.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>-t</option></term>
+ <term><option>--test=<replaceable>string</replaceable></option></term>
+ <listitem>
+ <para>Query the database with a modalias string, and print the
+ retrieved properties.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>-r</option></term>
+ <term><option>--root=<replaceable>string</replaceable></option></term>
+ <listitem>
+ <para>Alternative root path in the file system for reading and writing files.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>-h</option></term>