Reading Time: 6 minutesThis article explains the Linux file system hierarchy and identifies the most important directories. The File-system Hierarchy The Linux system stores all files on file systems, which are organized into a single inverted tree known as a file-system hierarchy. This hierarchy is an inverted tree because the tree root (/) is at the top, and…

Reading Time: 5 minutesIntroducing RHEL Lightspeed for RHEL Systems explains what RHEL Lightspeed is and how it can be helpful for RHEL administrators. First and foremost: What is RHEL Lightspeed? RHEL Lightspeed is a feature from Red Hat that uses Artificial Intelligence (AI) to help people manage and use Red Hat Enterprise Linux (RHEL) more easily. Think of…

Reading Time: 3 minutesRegistering a RHEL System for Red Hat Support shows how to register a Red Hat Enterprise Linux system to get Red Hat features, such as support, software repositories, bug fixes, enhancements, etc. Red Hat provides access to software repositories through the Red Hat Content Delivery Network (CDN) in a subscription-based model. Software repositories provide regularly updated packages,…

Reading Time: 8 minutesAn Overview of firewalld on RHEL 8 shows essential details of the firewall manager found on RHEL and derivative Linux distributions. First and foremost: What is a firewall? There are various definitions of what a firewall is, and there are many types of firewalls. In simple terms, a firewall is a system (software) responsible for…

Reading Time: 5 minutesAs part of a sysadmin job, configuring network interfaces is an essential task that every administrator must know. This article shows some ways to configure network interfaces using the tools nmcli and nmtui. First and foremost: What is NetworkManager? NetworkManager is the dynamic network control and configuration daemon used by many Linux distributions (including Red…

Reading Time: 3 minutesGRUB2 (GRand Unified Bootloader version 2) is the default boot loader on most Linux flavors. It resides in the Master Boot Record (BIOS systems) or the UEFI System Partition (UEFI systems) and is responsible for: How does GRUB2 work? Basically, we can pop up some GRUB2 stages: Stage 1: Installed in the MBR or EFI…