As Bernd Markgraf reported on desktop-discuss, gconftool-2 doesn't have a --usage option. It has a --help option.
Laca Index: Solaris/manpages/man1/gconftool-2.1 =================================================================== --- Solaris/manpages/man1/gconftool-2.1 (revision 10629) +++ Solaris/manpages/man1/gconftool-2.1 (working copy) @@ -49,7 +49,7 @@ <arg choice="opt"><option>-spawn</option></arg> <arg choice="opt"><option>-type=</option><group choice="plain"><arg choice="plain"><option role="nodash">int</option></arg><arg choice="plain"><option role="nodash">bool</option></arg><arg choice="plain"><option role="nodash">float</option></arg><arg choice="plain"><option role="nodash">string</option></arg><arg choice="plain"><option role="nodash">list</option></arg><arg choice="plain"><option role="nodash">pair</option></arg></group></arg> <arg choice="opt"><option>-unapply-schema</option></arg> -<arg choice="opt"><option>-usage</option></arg> +<arg choice="opt"><option>-help</option></arg> </cmdsynopsis></refsynopsisdiv> <refsect1 id="gconftool-2-1-desc"><title>&desc-tt;</title> <para>Each preference in the GConf repository is expressed as a key-value @@ -193,7 +193,7 @@ value of a preference key from the user setting to the setting in the default configuration source.</para> </listitem></varlistentry> -<varlistentry><term><option>-usage</option></term><listitem><para>Displays +<varlistentry><term><option>-help</option></term><listitem><para>Displays a brief help message about the <command>&cmd;</command> command, and the options that you can use with the <command>&cmd;</command> command.</para> </listitem></varlistentry>
