the
<code>$GIT_DIR/hooks/</code> directory, and are enabled by simply
removing the <code>.sample</code> suffix from the filename. In earlier versions
of Git you had to make them executable.</p>
</dd>
<dt class="hdlist1"><a id="def_index"></a>index</dt>
<dd>
<p>A collection of files with stat information, whose contents are stored
as objects. The index is a stored version of your
<a href="#def_working_tree">working tree</a>. Truth be told, it can also contain a second, and even
a third version of a working t