http://ftp.scientificlinux.org/linux/scientific/
http://www.rpmfind.net/linux/rpm2html/search.php?query=gcc
http://elrepo.org/linux/kernel/el6/x86_64/RPMS/
https://people.centos.org/tru/devtools-2/6/x86_64/RPMS/
原文：http://www.cnblogs.com/zengkefu/p/6193203.html