failure: l 和 Loaded plugins: fastestmirror 问题解决

failure: l 和 Loaded plugins: fastestmirror 问题解决

想用:

yum install screen

结果报错：

failure: l from epel: [Errno 256] No more mirrors to try.
.xml: [Errno 14] curl#6 - "Could not resolve host: tyun; No address associated with hostname"

以及

Loaded plugins: fastestmirror, langpacks 
File contains no section headers. file: file:///etc/yum.r

网上搜了很多，找到了个靠谱答案：
1、删掉旧的

rm -rf /pos.d/CentOS-*

2、下载国内源

wget -O /pos.po .repo  

3、清理缓存

yum clean all

4、

yum makeache
yum update

完成，可以继续安装screen了！

参考：