Index: en_US.ISO8859-1/books/handbook/jails/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/handbook/jails/chapter.xml
+++ en_US.ISO8859-1/books/handbook/jails/chapter.xml
@@ -1313,11 +1313,32 @@
 	  updates have the same limitations as if
 	  &man.freebsd-update.8; were being run directly.  The most
 	  important one is that only -RELEASE versions of &os; are
-	  available with this method.  To update the basejail to the
-	  latest patched release of the version of &os; on the host
-	  computer, use:</para>
+	  available with this method.</para>
+	
+	<para>To update a jail, such as in the case of applying a
+	  security patch (updating from 10.1-RELEASE-p1 to
+	  10.1-RELEASE-p2) use:</para>
+
+	<screen>&prompt.root; <userinput>ezjail-admin update -u</userinput></screen>
+
+	<para>To upgrade a jail (for example from 9.3-RELEASE to
+	  10.1-RELEASE), first upgrade the host system as described in
+	  <xref linkend="freebsdupdate-upgrade" />.  Once the host has
+	  been updated and rebooted, the jails can then be updated.
+	  The &man.freebsd-update.8; utility has no way of telling
+	  what version of &os; the jail was originally running, so the
+	  version to upgrade from must be specified.  Use the
+	  &man.file.1; utility to determine the original version of
+	  &os; that was installed in the jail:</para>
+
+	<screen>&prompt.root; <userinput>file /usr/jails/basejail/bin/sh</userinput>
+/usr/jails/basejail/bin/sh: ELF 64-bit LSB executable, x86-64, version 1 (FreeBSD), dynamically linked (uses shared libs), for FreeBSD 9.3, stripped</screen>
+
+	<para>Now use this information to perform the upgrade from
+	  9.3-RELEASE to the current version of your host
+	  system:</para>
 
-	<screen>&prompt.root; <userinput>ezjail-admin update -r</userinput></screen>
+	<screen>&prompt.root; <userinput>ezjail-admin update -U -s 9.3-RELEASE</userinput></screen>
 
 	<para>After updating the basejail, &man.mergemaster.8; can be
 	  run to update each jail's configuration files.</para>