注意：本人还没有发现这个源有什么优点！！！！

[root@bass yum.repos.d]# lsCentOS-Base.repo       CentOS-fasttrack.repo  CentOS-Vault.repoCentOS-Debuginfo.repo  CentOS-Media.repo[root@bass yum.repos.d]# rpm -ivh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpmRetrieving http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpmwarning: /var/tmp/rpm-tmp.PHC9xu: Header V3 DSA/SHA1 Signature, key ID 217521f6: NOKEYPreparing...                ########################################### [100%]   1:epel-release           ########################################### [100%][root@bass yum.repos.d]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL CentOS-Base.repo       CentOS-Media.repo      epel-testing.repoCentOS-Debuginfo.repo  CentOS-Vault.repo      CentOS-fasttrack.repo  epel.repo              [root@bass yum.repos.d]# rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL[root@bass yum.repos.d]# yum install yum-priorities[root@bass yum.repos.d]# ls |grep epelepel.repoepel-testing.repo[root@bass yum.repos.d]# pwd/etc/yum.repos.d