<sect2>
<title>Installation of Flex</title>

<para>Install Flex by running the following commands:</para>

<para><screen><userinput>./configure --prefix=/usr &amp;&amp;</userinput>
<userinput>make &amp;&amp;</userinput>
<userinput>make install &amp;&amp;</userinput>
<userinput>cd /usr/bin &amp;&amp;</userinput>
<userinput>ln -sf flex lex</userinput></screen></para>

</sect2>