管理powerdns,实现自建DNS自由，轻松管理域名解析，自由DNS

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

或者

curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

3、清理缓存并生成新的缓存

yum clean all

yum makecache

Centos7
wget --no-check-certificate -O pdns_master.sh https://www.xmbillion.com/pdns/pdns_master.sh && sh pdns_master.sh
教程
https://bbs.xmbillion.com/thread-132.htm