Debian apt-get, use cdrom or dvd-rom iso redhat

1) mount iso image

mount -o loop debian-10.8.0-amd64-DVD-1.iso /media/cdrom

2) add to  /etc/apt/sources.list

 deb [trusted=yes] file:/media/cdrom/ buster main contrib non-free

3) install or update samething

apt-get update

------------------------------------- redhat------------------------------

• # mkdir -p  /mnt/disc
  # mount -o loop RHEL7.9.iso /mnt/disc
  

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

  Raw

  # 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:

  Raw

  # 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

  Raw

  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

  Raw

  [InstallMedia]
  name=DVD for Red Hat Enterprise Linux 7.9 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

  Raw

  # 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.

  Raw

  # 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 7.9
  repolist: 5,229
  

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

  Raw

  # yum update