centos 使用fedora源 - C++ 技术中心 - C++博客
1. 可以从该处理下 http://fedoraproject.org/wiki/EPEL包
http://dl.fedoraproject.org/pub/epel/ 目录下查找：
http://dl.fedoraproject.org/pub/epel/6/x86_64/下
rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
2. 导入key：
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
3. yum install yum-priorities