创建一个本地Yum 仓库，提升速度，减少带宽

mkdir /YUM
mount -t iso9660 -o loop /home/dan/Centos-7-x86_x64-DVD.iso /mnt/iso/
rpm -ivh deltarpm python-deltarpm createrepo
createrepo -v /YUM
yum clean all 
 6 yum repolist


　　　　#cat /etc/yum.repos.d/local.repo

1. LOCAL REPO]
2. Name=Local YUM
3. baseurl=file:///YUM
4. gpgcheck=0
5. enabled=1

via:

从 ISO 和在线仓库创建一个 Yum 仓库

创建局域网内的离线 YUM 仓库