yum install yum-utils #reposync在这里
yum install createrepo
reposync -r epel -p /root/
createrepo -v /root/epel #好了以后epel下除了Packages目录,多一个repodata目录
vim /etc/yum.repos.d/offline-epel.repo
[epel] name=epel baseurl=file:///root/epel enabled=1 gpgcheck=0
yum clean all
yum makecache
mkisofs -r -o /root/centos7-epel.iso /root/epel/epel
原文:https://www.cnblogs.com/old-path-white-cloud/p/11653100.html