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<a name="Shell-Commands"></a>
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<a name="Shell-Commands-1"></a>
<h3 class="section">2.3 Shell Commands</h3>

<p>If you need to execute occasional shell commands during your
debugging session, there is no need to leave or suspend <small>GDB</small>; you can
just use the <code>shell</code> command.
</p>
<dl compact="compact">
<dd><a name="index-shell"></a>
<a name="index-_0021"></a>
<a name="index-shell-escape"></a>
</dd>
<dt><code>shell <var>command-string</var></code></dt>
<dt><code>!<var>command-string</var></code></dt>
<dd><p>Invoke a standard shell to execute <var>command-string</var>.
Note that no space is needed between <code>!</code> and <var>command-string</var>.
If it exists, the environment variable <code>SHELL</code> determines which
shell to run.  Otherwise <small>GDB</small> uses the default shell
(<samp>/bin/sh</samp> on Unix systems, <samp>COMMAND.COM</samp> on MS-DOS, etc.).
</p></dd>
</dl>

<p>The utility <code>make</code> is often needed in development environments.
You do not have to use the <code>shell</code> command for this purpose in
<small>GDB</small>:
</p>
<dl compact="compact">
<dd><a name="index-make"></a>
<a name="index-calling-make"></a>
</dd>
<dt><code>make <var>make-args</var></code></dt>
<dd><p>Execute the <code>make</code> program with the specified
arguments.  This is equivalent to &lsquo;<samp>shell make <var>make-args</var></samp>&rsquo;.
</p></dd>
</dl>


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