Red Hat’s Anaconda installer, used by Red Hat Enterprise Linux, Oracle Linux, and other RHEL-like distributions, offers a powerful customization method through an additional product.img file. This technique allows you to modify the first boot sequence with relative ease. What is product.img? The product.img is an additional image file that can be used to override…
I encountered an intriguing issue recently after replacing my motherboard. Some block devices underwent a change in their order, causing /dev/sda to appear as /dev/sdy due to a modification in the PCI-e enumeration. This change, though seemingly insignificant, led to an unexpected consequence. Since the disk was subject to a specific mdadm filter, its altered…
I have recently acquired a new computer without an operating system, and I wish to install Oracle Enterprise Linux version 9.1 on it. The ISO file required for the installation is located on an NFS file server, accessible through a network infrastructure. The hardware boots using uEFI, and I have a USB disk-on-key containing Ubuntu…
A disclaimer: I use OEL for server-use when I can. A long support window, an enterprise environment, and yes, a very low rate of changes within the life cycle of the operating system makes it a very good candidate to hold services I do not want to fuss around, correcting configuration files on update or…
History file is a great source of information, either if you do not remember your past actions, or if you are not a single administrator of a system, and you need to figure out what has been performed on it in the past. Unfortunately, history is not a very reliable source of information – the…
RedHat introduced using modules in DNF on RHEL version 8 (and above). This opens very interesting new options, however, sometimes – a quick-n-dirty repo is needed. An example – for offline systems, a repo of already installed packages (on exactly similar system) is created for later use. This used to work well on RHEL version…
