How to create Yum Repository in Linux

http://computernetworkingnotes.com/network-administrations/yum-server.html
http://www.unixarena.com/2013/05/how-to-create-yum-repository-in-redhat.html
http://docs.oracle.com/cd/E37670_01/E37355/html/ol_create_repo.html
http://www.oracle-base.com/articles/linux/create-a-local-yum-repository-for-oracle-linux-6.php