Expand sudo configuration comments

postlfs/security/sudo.xml

@@ -215,11 +215,28 @@ ln -sfv libsudo_util.so.0.0.0 /usr/lib/sudo/libsudo_util.so.0</userinput></scree
         <systemitem class="username">root</systemitem> user:
       </para>
 
-<screen role="root"><userinput>cat &gt; /etc/sudoers.d/sudo &lt;&lt; "EOF"
+<screen role="root"><userinput>cat &gt; /etc/sudoers.d/00-sudo &lt;&lt; "EOF"
 <literal>Defaults secure_path="/usr/sbin:/usr/bin"
 %wheel ALL=(ALL) ALL</literal>
 EOF</userinput></screen>
 
+      <note>
+        <para>
+          In very simple installations where there is only one user, it
+          may be easier to just edit the <filename>/etc/sudoers</filename>
+          file directly.  In that case, the <varname>secure_path</varname>
+          entry may not be needed and using <command>sudo -E ...</command> can
+          import the non-privileged user's full environment into the 
+          privileged session.
+        </para>
+        
+        <para>
+          The files in the <filename class="directory">/etc/sudoers.d</filename> 
+          directory are parsed in sorted lexical order. Be careful that entries 
+          in an added file do not overwrite previous entries.
+        </para>
+      </note>
+
       <para>
         For details, see <command>man sudoers</command>.
       </para>