how to setup a local yum repository on centos 7?

Step1: mkdir /mnt/cdrom mount /dev/cdrom /mnt/cdrom Step 2: mkdir /opt/backup-repo mv /etc/yum.repos.d/*.repo /opt/backup-repo vi /etc/yum.repos.d/local.repo [LocalRepo] name=LocalRepository baseurl=file:///mnt/cdrom enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 Step 3: Yum clean all Yum repolist all //test yum local Yum install httpd link download Centos DVD: https://mirror.umd.edu/centos/7/isos/x86_64/