Tweak the explanation of System.map

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9192 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter08/kernel.xml

@@ -127,7 +127,8 @@
     <para><filename>System.map</filename> is a symbol file for the kernel.
     It maps the function entry points of every function in the kernel API,
     as well as the addresses of the kernel data structures for the running
-    kernel. Issue the following command to install the map file:</para>
+    It is used as a resource when investigating kernel problems. 
+    Issue the following command to install the map file:</para>
 
 <screen><userinput remap="install">cp -v System.map /boot/System.map-&linux-version;</userinput></screen>