Author: Danilo

Edit Text Files from the Command Line on RHEL aims to provide essential knowledge of how to edit text files on Linux. We’re using Red Hat Enterprise Linux to provide the examples; however, you can use any Linux flavor for that. There are many text editors, so we’ll focus on “vim” in this article. What is Vim? Key Features of Vim Installing Vim As we mentioned earlier, Vim is already installed on most Unix/Linux systems. However, if necessary, installing Vim is a very straightforward task. With the vim-minimal package, you might install the vi editor with core features. This lightweight installation includes only the…

Matching File Names with Shell Expansions on RHEL shows what command-line expansions are and provides some usage examples. We’re using Red Hat Enterprise Linux 10, but all the examples apply to any Linux distribution. What are Command-Line Expansions? When we type a command at the Bash shell prompt, the shell processes that command line through multiple expansions before running it. We can use these shell expansions to perform complex tasks that would otherwise be difficult or impossible. The Bash shell can perform the following expansions: What “expansion” means: When you type a command, Bash scans the line for special patterns such as…

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…