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<a name="Modifiers-1"></a>
<h4 class="subsection">33.1.3 Modifiers</h4>
<p>After the optional word designator, you can add a sequence of one or more
of the following modifiers, each preceded by a &lsquo;<samp>:</samp>&rsquo;.
</p>
<dl compact="compact">
<dt><code>h</code></dt>
<dd><p>Remove a trailing pathname component, leaving only the head.
</p>
</dd>
<dt><code>t</code></dt>
<dd><p>Remove all leading pathname components, leaving the tail.
</p>
</dd>
<dt><code>r</code></dt>
<dd><p>Remove a trailing suffix of the form &lsquo;<samp>.<var>suffix</var></samp>&rsquo;, leaving
the basename.
</p>
</dd>
<dt><code>e</code></dt>
<dd><p>Remove all but the trailing suffix.
</p>
</dd>
<dt><code>p</code></dt>
<dd><p>Print the new command but do not execute it.
</p>
</dd>
<dt><code>s/<var>old</var>/<var>new</var>/</code></dt>
<dd><p>Substitute <var>new</var> for the first occurrence of <var>old</var> in the
event line. Any delimiter may be used in place of &lsquo;<samp>/</samp>&rsquo;.
The delimiter may be quoted in <var>old</var> and <var>new</var>
with a single backslash. If &lsquo;<samp>&amp;</samp>&rsquo; appears in <var>new</var>,
it is replaced by <var>old</var>. A single backslash will quote
the &lsquo;<samp>&amp;</samp>&rsquo;. The final delimiter is optional if it is the last
character on the input line.
</p>
</dd>
<dt><code>&amp;</code></dt>
<dd><p>Repeat the previous substitution.
</p>
</dd>
<dt><code>g</code></dt>
<dt><code>a</code></dt>
<dd><p>Cause changes to be applied over the entire event line. Used in
conjunction with &lsquo;<samp>s</samp>&rsquo;, as in <code>gs/<var>old</var>/<var>new</var>/</code>,
or with &lsquo;<samp>&amp;</samp>&rsquo;.
</p>
</dd>
<dt><code>G</code></dt>
<dd><p>Apply the following &lsquo;<samp>s</samp>&rsquo; modifier once to each word in the event.
</p>
</dd>
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