 compress to smaller size.  Supported
values are from <code>-0</code> (store-only) to <code>-9</code> (best ratio).
Default is <code>-6</code> if not given.</p>
</dd>
</dl>
</div>
</div>
<div class="sect2">
<h3 id="_tar">tar</h3>
<div class="dlist">
<dl>
<dt class="hdlist1">-&lt;number&gt;</dt>
<dd>
<p>Specify compression level. The value will be passed to the
compression command configured in <code>tar.&lt;format&gt;.command</code>. See
manual page of the configured command for the list of supported
levels