Author: Danilo

Creating links between files in Linux is an important task for system administrators who need to manage files efficiently. This article explains how hard links and symbolic links work, including their differences and practical usage examples. All examples in this guide are demonstrated using Red Hat Enterprise Linux 10, but the concepts and commands can be applied to any Linux distribution. Understanding file links helps administrators organize data and manage file references more effectively. In Linux, a link is an additional file name that points to existing data stored on the file system. There are two main types of links:…

Managing Files from the Command Line provides an introduction to managing files using the command line on a Linux system. We’re using Red Hat Enterprise Linux (RHEL) 10; however, all instructions are compatible with any Linux distribution. Creating, copying, moving, and removing files and directories are common and essential operations for a Linux system administrator. We will provide some examples of how to complete each task effectively. Creating Files In any Linux system, there are many ways to create a file. We will pinpoint some examples of that: Examples: 1- Creating files using the cat and echo commands, redirecting the…

This article explains the Linux file system hierarchy and the purpose of the most important directories found in a Linux operating system. Understanding this structure is essential for system administrators who need to navigate, troubleshoot, and manage Linux environments efficiently. 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 the branches of directories and subdirectories stretch below the root: It’s essentially the directory structure you see starting from…

Introducing 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 it as a built-in “AI assistant” for RHEL. It can: Basically, it makes RHEL easier to understand and manage, especially for people who aren’t Linux experts yet. The command-line assistant powered by RHEL Lightspeed The command-line assistant powered by RHEL Lightspeed is an optional AI…

Registering 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, including security patches, bug fixes, and enhancements. Customers with active subscriptions can access Red Hat content repositories to install new software packages and to stay up-to-date with the latest updates. In addition to software updates, an active subscription provides customers with technical resources such as Customer…

firewalld on RHEL 8 is the default firewall management service used to control network traffic and improve system security. It provides a flexible way to define rules, allowing administrators to manage incoming and outgoing connections based on different network requirements. Unlike directly managing low-level firewall rules, firewalld provides an abstraction layer based on zones, services, ports, and interfaces. This approach simplifies firewall administration while maintaining the flexibility required in enterprise Linux environments. In this article, we will explore the main concepts of firewalld on RHEL 8, including how zones work, how to check the firewall status, and how to configure…