updated explanations

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@2182 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/e2fsprogs-exp.xml

@@ -15,5 +15,9 @@ libraries that some programs in this package can make use of.</para>
 <para><userinput>make install-libs:</userinput> This installs the shared
 libraries that are built.</para>
 
+<para><userinput>install-info...:</userinput> This updates the
+<filename>/usr/share/info/dir</filename> file to include this package's
+info pages to the index.</para>
+
 </sect2>