yum repository for locally-mounted DVD on Red Hat Enterprise Linux 7

• Once you have downloaded a DVD version of your chosen Rhel Version and copied it over to a location on your server.
• Mount the RHEL installation ISO to a directory like /mnt/disc, e.g.:
  
  

  # mkdir -p  /mnt/disc
  # mount -o loop RHEL7.1.iso /mnt/disc
  

  If you use DVD media , you can mount like below.
  
  

  # mkdir -p  /mnt/disc
  # mount /dev/sr0  /mnt/disc
  

• Copy the media.repo file from the root of the mounted directory to /etc/yum.repos.d/ and set the permissions to 0644 or another similar permissions set:

  # cp /mnt/disc/media.repo /etc/yum.repos.d/rhel7dvd.repo
  # chmod 644 /etc/yum.repos.d/rhel7dvd.repo
  

• Edit the new repo file, changing the gpgcheck=0 setting to 1 and adding the following 3 lines

  vi /etc/yum.repos.d/rhel7dvd.repo
  enabled=1
  baseurl=file:///mnt/disc/
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
  

  In the end, the new repo file could look like the following

  [InstallMedia]
  name=DVD for Red Hat Enterprise Linux 7.1 Server
  mediaid=1359576196.686790
  metadata_expire=-1
  gpgcheck=1
  cost=500
  enabled=1
  baseurl=file:///mnt/disc/
  gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
  

• Clear the cache and check whether you can get the packages list from the DVD repo

    # yum clean all
    # yum repolist enabled

• It should look like the following if no other repository is enabled.
  To avoid any corruption its recommend to disable any non-redhat repositories.

# yum repolist enabled
Loaded plugins: product-id, search-disabled-repos, subscription-manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
repo id                                                                                 repo name                                                                     
InstallMedia                                                                        Red Hat Enterprise Linux 7.7 
repolist: 5,229

• If no errors are returned, the following can be used to update:

  # yum update