Category: Linux
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Matching File Names with Shell Expansions on RHEL
Reading Time: 4 minutesMatching 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…
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Creating Links Between Files on RHEL
Reading Time: 5 minutesCreating Links Between Files on RHEL shows what hard links and symbolic links are and how to use them effectively. All examples will be provided using Red Hat Enterprise Linux 10; however, they can be used on any Linux distribution. First and foremost: What is a link? We can create multiple file…
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Managing Files from the Command Line
Reading Time: 5 minutesManaging 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…
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Do you know the Linux File-system Hierarchy?
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…
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Introducing RHEL Lightspeed for RHEL Systems
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…
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Registering a RHEL System for Red Hat Support
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…
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An Overview of firewalld on RHEL 8
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…
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Configuring Network Interfaces with nmcli and nmtui
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…
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GRUB2 Overview
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…
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What is Shell Scripting?
Reading Time: 12 minutesThis article explains what shell scripting is and provides some examples of usage. We’re using Red Hat Enterprise Linux, but all commands work in any Linux flavor. First and foremost: What is Shell Scripting? In Linux, a shell script is simply a text file containing commands you would normally type in the…
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Using “tar” on RHEL 8
Reading Time: 4 minutesUsing “tar” on RHEL 8 shows how to use the “tar” command to perform backups and archives, with or without compression, and provides a lot of examples of usage. All the practical examples are shown using Red Hat Enterprise Linux; however, they work on any Linux flavor. First and foremost: What is…
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What are Module Streams on RHEL?
Reading Time: 4 minutesModule Streams are part of the Application Streams feature in RHEL. They allow multiple versions of software to be available and managed independently. Key Concepts: This system lets you install and manage different versions of software without conflicts. 1- List all available modules: 2- Filtering by a specific module: or As we…