You can also copy the ISO to the local filesystem and mount it. If your host is a VM, mount it as your hypervisor dictates. You have options if you don’t automount ISOs. If you need to mount the ISO on a host with a Blu-ray player or on the local filesystem, see the manual mount section below.Ī) Mount the ISO. Since I have VMs, I will mount the ISO to the VM. > genisoimage -U -r -v -J -joliet-long -allow-multidot -allow-lowercase -iso-level 4 -o /vboxshare/ /repoģ) Burn the ISO (as a file, not as an extracted image), or copy to a USB drive and move it to the offline host. The syntax is: genisoimage cli options – location and name of ISO file to be created and files/folders to be included in the ISO. In the command below, I write this ISO image to a VirtualBox shared folder mounted at /vboxshare. > /usr/bin/rsync -avrt rsync:///centos//extras/x86_64/ /repo/extrasĬ) Use genisoimage to create an ISO of the whole set. > /usr/bin/rsync -avrt rsync:///centos//updates/x86_64/ /repo/updates You need a Blu-ray burner or USB drive to move the file. Note that these folders will create a 17.1 Gig ISO file in the next step. The full list is listed below.ī) Use rsync to harvest the rpms and repo data. I only require os, extras and updates but you may have packages installed from other folders. You can specify any folder(s) you require. If not install them.Ģ) On your internet facing host create folders for the packages you need. On a host with internet access (Public facing host) or a local repo, perform the following steps.ġ) Make sure you have genisoimage and yum-utils installed. This post demonstrates how to patch or upgrade a CentOS 7 host when it doesn’t have internet access or is an isolated system with no access to a yum repo.
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