Red Hat Training and Certification - RHEL 8/9 (RH124) (Udemy.com)

This training module is not authorized or affiliated with Red Hat, Inc. It is an independent educational resource designed to help learners prepare for the Red Hat Certified System Administrator (RHCSA) exam.

Course Description:

This course is part of the Red Hat Certified System Administrator (RHCSA) learning path and corresponds to RH124 – Red Hat System Administration I.

The course includes two sets of lectures to give learners exposure to both major versions of Red Hat Enterprise Linux:

• Part 1: Based on Red Hat Enterprise Linux 9 (RH124)

• Part 2: Based on Red Hat Enterprise Linux 8 (RH124)

The RHEL 8 lectures provide a solid foundation in Linux system administration, while the newly added RHEL 9 lectures focus on the latest tools, commands, and enhancements in the Red Hat ecosystem.

Through a balanced mix of concept explanations, live demonstrations, and hands-on labs, learners will develop the practical skills required to manage and operate Linux systems confidently — preparing them for the RHCSA certification (RH124) and real-world enterprise environments.

Part 1: Course Content

[NEW] Red Hat Training and Certification - RHEL 9 (RH124)

Introduction

• What's New in RHEL 9

Step-by-step Installation Guide for RHEL 9

• Step-by-step Overview of RHEL 9 Installation

• How to Create a New Red Hat Login ID?

• Download RHEL 9.2 ISO Image File

• Create a RHEL9 template using Oracle VirtualBox

• Installation of Red Hat Enterprise Linux 9

• Install dependencies for VirtualBox Guest Additions

• Install VirtualBox Guest Additions on RHEL for Enhanced Functionality

• Troubleshooting

Access the Command Line

• Introduction to the Bash Shell

• Log in to a Local System

• Log in to a Remote System

• Log out from a Remote System

Access the Command Line with the Desktop

• Introduction to the GNOME Desktop Environment

• Parts of the GNOME Shell

• Understand Workspaces

• Start a Terminal

• Lock the Screen and Log Out

• Power off or Reboot the System

Execute Commands with the Bash Shell

• Basic Command Syntax

• Write Simple Commands

• Tab Completion

• Write Long Command on Multiple Lines

Manage Files from the Command Line

• Linux File System Hierarchy Concepts

• Practice Lab - Absolute & Relative Paths

• Command-line File Management

• Manage Links Between Files

• Practice Lab - Hard Link

• Practice Lab - Soft Link

• Match File Name with Shell Expansions

• Practice Lab - Tilde Expansion (~)

• Practice Lab - Variable Expansion

• Practice Lab - Command Substitution

Create, View, and Edit Text Files

• Standard Input, Output and Error

• Output Redirection Operators

• Practice Lab - STDIN, STDOUT & STDERR

• Practice Lab - Construct Pipelines

• Practice Lab - tee command

• Edit Files with Vim

• Practice Lab - Vim Editor

• Practice Lab - Visual Mode

Change the Shell Environment

• Shell Variables

• Practice Lab - Environment Variables

• Practice Lab - Assign Values to Variables

• Practice Lab - Configure Bash with Shell Variables

• Practice Lab - Configure Bash with Shell Variables

Get Help in Linux

• Read Manual Pages

• Practice Lab - Get Help

Manage Local Users and Groups

• Overview of User Account

• Group Account

• Primary and Secondary Group

• Practice Lab Session - Manage Local User Accounts

• Practice Lab Session - Manage Group Accounts

• Shadow file

• Superuser - root user

• Switch user - su

• Run command with sudo

• Configure sudo

Control Access to Files - Permissions in Linux

• Overview of Linux File-system Permissions

• Symbolic & Numerical Notations in Linux

• Understand Linux File-system Permissions with diagram

• Practice Lab Session: Linux File-system Permissions

• Practice Lab Session: Change Ownership

• Change Permissions with Symbolic Method

• Change Permissions with Octal Method

• Special Permission - SetUID

• Command to apply SetUID

• Special Permissions - SetGID

• Special Permissions - Sticky Bit

Monitor and Manage Linux Processes

• Definition of a Process

• Describe Process State

• Practice Lab - top command

• Practice Lab - Listing Processes

• Control Jobs - Foreground & Background Processes

• Practice Lab - Foreground & Background Processes

• Process Control with Signals

• Practice Lab - SIGTSTP, SIGSTOP, SIGCONT, SIGTERM, SIGKILL

• Practice Lab - SIGINT, SIGHUB

Control Services and Daemons

• Introduction to Systemd

• Practice Lab - Systemd Service

• Practice Lab - Restart, Reload, Mask Service

• Practice Lab - Systemd Targets

• Practice Lab - List Service Unit

Configure and Secure SSH

• About Openssh

• SSH Hot Keys

• SSH Key Based Authentication

• Practice Lab

• Customize OpenSSH

• Practice Lab - Prohibit Root User

• Practice Lab - Prohibit Password-based Authentication

• Practice Lab - Private key-based Logins

Analyzing & Storing Logs

• System Logging

• Log Events to the System

• Practice Lab - Rsyslog Service

• Practice Lab - Collecting Information Journalctl

• Practice Lab - Journalctl Command

• Log file rotation

Archiving and Transfer Files