Hi,

I have tried to create a local repository of Centos8 on virtual machine. I went through couple of articles and some youtube but it did not resolve the issue to make the repository for BaseOS and Appstream.After installation of centos8/rhel8 on VM, the drive /dev/sr0 does not show any iso file installed on it , running by command # df -h.
I tried to connect the image again on VM but the storage setting is gray out and am not able to connect the image. Please advice.
Oops: Do we really need to have a local repository of BaseOS and AppStrean while there is lack of space in our machine? In my case, I should be able to install packages from local repository with no internet access. Thanks!

I am not sure what your question is.

A few points that are unclear to me:
Why do you expect to see an ISO file on /dev/sr0? How can you use the df command to check for the presence of a file?
Which image did you try to connect, and precisely what is grayed out?
No, you don't need a local repository. Why do you want to create one? Why do you want to create one although you don't have enough space?

Rather than paraphrasing what you did, show the precise commands and their results.

Thank you for your reply.

we need to install packages from (local?) repository since there is no internet access at the exam (redhat exam) so I managed to create a local repository BaseOS and Appstream/RHEL by manually adding an iso image to VM! The "df -h" command refuse to give any out on /dev/sr0 or /dev/cdrom-/media neither lsblk.
It appears at command "#yum repolist" that the repo has successfully been created.

So there are two questions at this point:
1-Can not still install yet the packages (i.e yum install zsh) the error standing for not being able to downalod meta data and to recognize hostname. Do we need to change /resolv.conf configuration file to be able to install packages from local repo? It seems that "install" command yet relying on the internet.
ps: Cleaning dnf cache did not help (#rm -r /var/cache/dnf neither yum clean all)

2- Is there any other alternative to install packages with no internet access at the exam? in case of no enough space.

If you have no space, you can't create a local repo.

Still waiting for the commands you use, and their output. df only lists mounted filesystems.

Yum/dnf will always try to refresh metadata by default and does all the dependency resolving thus installing multiple latest available packages without much effort/input on your end.
You can disable all internet based repositories and only enable your local repo with commands:
Theoretically now when you go to install a package with dnf, providing all dependencies are also in the local cache, it will only update metadata of your local repo and install the packages.

Another thing to consider, is to add the line below to /etc/dnf/dnf.conf to avoid updating metadata altogether:
You can add that to /etc/yum.conf if you are using yum.

You can install local packages using rpm commands, the typical command structure to install an .rpm packaged is:
If there are unmet dependencies that need to be installed first, it will come back and tell you what else needs to be installed. You will then use the same rpm -ivh command to install those needed packages first, then when you go to install the original package you want to install, it may install without issues or come back and tell you something else needs to be installed, to which you install it and eventually all dependencies will be installed and you can then successfully install the original intended package. But keep note of the version number of the packages it tells you need be installed, it can't be a different version.

You need to setup a .repo file under /etc/yum.repos.d, and mount the dvd for a dvd iso repo, like the following steps:

https://www.itzgeek.com/how-tos/linu...using-dvd.html

or

https://www.linuxtechi.com/setup-loc...sitory-rhel-8/

Remember run the following dnf commands to confirm.