Local Repository

# mount -o loop /usr/local/src/CentOS_7.9_x86_64.iso /mnt/centos7.9/

mount: /dev/loop0 is write-protected, mounting read-only

 

# vi /etc/yum.repos.d/CentOS-7.9.repo

[Internal-Media]

name=Internal Repository

baseurl=file:///mnt/centos7.9/

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7