disable updates in Fedora 21 installation example

diff --git a/trex_book.asciidoc b/trex_book.asciidoc
index fd3f992..c84e77d 100755 (executable)
--- a/trex_book.asciidoc
+++ b/trex_book.asciidoc
@@ -1692,6 +1692,10 @@ SELINUX=disabled
 * Run: +
 systemctl disable firewalld 
 
+* Edit file /etc/yum.repos.d/fedora-updates.repo +
+set everywhere: +
+enabled=0
+
 * Reboot
 
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