# rpm -V yum ; ls -l /etc/yum.repos.d/
total 24
-rw-r--r--  1 root root 2364 Aug 23  2006 CentOS-Base.repo
-rw-r--r--  1 root root  610 Aug 23  2006 CentOS-Media.repo
-rw-r--r--  1 root root  954 Apr  3  2007 epel.repo
-rw-r--r--  1 root root  771 Apr  3  2007 epel-testing.repo