转：CentOS系统yum源配置修改、yum安装软件包源码包出错解决办法！

yum安装包时报错：

Could not retrieve mirrorlist http://mirrorlist.repoforge.org/el6/mirrors-rpmforge error was
14: PYCURL ERROR 7 - "couldn't connect to host"
http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/repodata/repomd.xml: [Errno 14] 
PYCURL ERROR 7 - "couldn't connect to host"
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: rpmforge. 
Please verify its path and try again

解决办法：

1、下载新的CentOS-Base.repo 到/etc/yum.repos.d/【版本是5.*的下载5、6.*下载6、7.*下载7】

[root@localhost ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

2、然后执行以下命令：

[root@localhost ~]# rpm -e rpmforge-release --nodeps
[root@localhost ~]# yum clean all 
[root@localhost ~]# yum update