RH124 - ch08s02

Preface A: Introduction

Section A.1: Orientation to the Classroom Lab Environment

Chapter 1: Accessing the Command Line

Section 1.1: Accessing the Command Line Using the Local Console

Section 1.2: Quiz: Local Console Access Terms

Section 1.3: Accessing the Command Line Using the Desktop

Section 1.4: Guided Exercise: The GNOME 3 Desktop Environment

Section 1.5: Executing Commands Using the Bash Shell

Section 1.6: Quiz: Bash Commands and Keyboard Shortcuts

Section 1.7: Lab: Accessing the Command Line

Chapter 2: Managing Files From the Command Line

Section 2.1: The Linux File System Hierarchy

Section 2.2: Quiz: File System Hierarchy

Section 2.3: Locating Files by Name

Section 2.4: Quiz: Locating Files and Directories

Section 2.5: Managing Files Using Command-Line Tools

Section 2.6: Guided Exercise: Command-Line File Management

Section 2.7: Matching File Names Using Path Name Expansion

Section 2.8: Quiz: Path Name Expansion

Section 2.9: Lab: Managing Files with Shell Expansion

Chapter 3: Getting Help in Red Hat Enterprise Linux

Section 3.1: Reading Documentation Using man Command

Section 3.2: Guided Exercise: Using the man Command

Section 3.3: Reading Documentation Using pinfo Command

Section 3.4: Guided Exercise: Using the pinfo Command

Section 3.5: Reading Documentation in /usr/share/doc

Section 3.6: Guided Exercise: Viewing Package Documentation

Section 3.7: Getting Help From Red Hat

Section 3.8: Guided Exercise: Creating and Viewing an SoS Report

Section 3.9: Lab: Viewing and Printing Help Documentation

Chapter 4: Creating, Viewing, and Editing Text Files

Section 4.1: Redirecting Output to a File or Program

Section 4.2: Quiz: I/O Redirection and Pipelines

Section 4.3: Editing Text Files from the Shell Prompt

Section 4.4: Guided Exercise: Editing Files with Vim

Section 4.5: Editing Text Files with a Graphical Editor

Section 4.6: Guided Exercise: Copying Text Between Windows

Section 4.7: Lab: Creating, Viewing, and Editing Text Files

Chapter 5: Managing Local Linux Users and Groups

Section 5.1: Users and Groups

Section 5.2: Quiz: User and Group Concepts

Section 5.3: Gaining Superuser Access

Section 5.4: Guided Exercise: Running Commands as root

Section 5.5: Managing Local User Accounts

Section 5.6: Guided Exercise: Creating Users Using Command-line Tools

Section 5.7: Managing Local Group Accounts

Section 5.8: Guided Exercise: Managing Groups Using Command-line Tools

Section 5.9: Managing User Passwords

Section 5.10: Guided Exercise: Managing User Password Aging

Section 5.11: Lab: Managing Local Linux Users and Groups

Chapter 6: Controlling Access to Files with Linux File System Permissions

Section 6.1: Linux File System Permissions

Section 6.2: Quiz: Interpreting File and Directory Permissions

Section 6.3: Managing File System Permissions from the Command Line

Section 6.4: Guided Exercise: Managing File Security from the Command Line

Section 6.5: Managing Default Permissions and File Access

Section 6.6: Guided Exercise: Controlling New File Permissions and Ownership

Section 6.7: Lab: Controlling Access to Files with Linux File System Permissions

Chapter 7: Monitoring and Managing Linux Processes

Section 7.1: Processes

Section 7.2: Quiz: Processes

Section 7.3: Controlling Jobs

Section 7.4: Guided Exercise: Background and Foreground Processes

Section 7.5: Killing Processes

Section 7.6: Guided Exercise: Killing Processes

Section 7.7: Monitoring Process Activity

Section 7.8: Guided Exercise: Monitoring Process Activity

Section 7.9: Lab: Monitoring and Managing Linux Processes

Chapter 8: Controlling Services and Daemons

Section 8.1: Identifying Automatically Started System Processes

SectionSection 8.2: Guided Exercise: Identify the Status of systemd Units

Section 8.3: Controlling System Services

Section 8.4: Guided Exercise: Using systemctl to Manage Services

Section 8.5: Lab: Controlling Services and Daemons

Chapter 9: Configuring and Securing OpenSSH Service

Section 9.1: Accessing the Remote Command Line with SSH

Section 9.2: Guided Exercise: Accessing the Remote Command Line

Section 9.3: Configuring SSH Key-based Authentication

Section 9.4: Guided Exercise: Using SSH Key-based Authentication

Section 9.5: Customizing SSH Service Configuration

Section 9.6: Guided Exercise: Restricting SSH Logins

Section 9.7: Lab: Configuring and Securing OpenSSH Service

Chapter 10: Analyzing and Storing Logs

Section 10.1: System Log Architecture

Section 10.2: Quiz: System Logging Components

Section 10.3: Reviewing Syslog Files

Section 10.4: Guided Exercise: Finding Log Entries

Section 10.5: Reviewing systemd Journal Entries

Section 10.6: Guided Exercise: Finding Events With journalctl

Section 10.7: Preserving the systemd Journal

Section 10.8: Guided Exercise: Configure a Persistent systemd Journal

Section 10.9: Maintaining Accurate Time

Section 10.10: Guided Exercise: Adjusting System Time

Section 10.11: Lab: Analyzing and Storing Logs

Chapter 11: Managing Red Hat Enterprise Linux Networking

Section 11.1: Networking Concepts

Section 11.2: Quiz: Networking Concepts

Section 11.3: Validating Network Configuration

Section 11.4: Guided Exercise: Examining Network Configuration

Section 11.5: Configuring Networking with nmcli

Section 11.6: Guided Exercise: Configuring Networking with nmcli

Section 11.7: Editing Network Configuration Files

Section 11.8: Guided Exercise: Editing Network Configuration Files

Section 11.9: Configuring Host Names and Name Resolution

Section 11.10: Guided Exercise: Configuring Host Names and Name Resolution

Section 11.11: Lab: Managing Red Hat Enterprise Linux Networking

Chapter 12: Archiving and Copying Files Between Systems

Section 12.1: Managing Compressed tar Archives

Section 12.2: Guided Exercise: Backing Up and Restoring Files From a tar Archive

Section 12.3: Copying Files Between Systems Securely

Section 12.4: Guided Exercise: Copying Files Over the Network With scp

Section 12.5: Synchronizing Files Between Systems Securely

Section 12.6: Guided Exercise: Synchronizing Two Directories Securely With rsync

Section 12.7: Lab: Archiving and Copying Files Between Systems

Chapter 13: Installing and Updating Software Packages

Section 13.1: Attaching Systems to Subscriptions for Software Updates

Section 13.2: Quiz: Red Hat Subscription Management

Section 13.3: RPM Software Packages and Yum

Section 13.4: Quiz: RPM Software Packages

Section 13.5: Managing Software Updates with yum

Section 13.6: Guided Exercise: Installing and Updating Software with yum

Section 13.7: Enabling yum Software Repositories

Section 13.8: Guided Exercise: Enabling Software Repositories

Section 13.9: Examining RPM Package Files

Section 13.10: Guided Exercise: Working with RPM Package Files

Section 13.11: Lab: Installing and Updating Software Packages

Chapter 14: Accessing Linux File Systems

Section 14.1: Identifying File Systems and Devices

Section 14.2: Quiz: Identifying File Systems and Devices

Section 14.3: Mounting and Unmounting File Systems

Section 14.4: Guided Exercise: Mounting and Unmounting File Systems

Section 14.5: Making Links Between Files

Section 14.6: Guided Exercise: Making Links Between Files

Section 14.7: Locating Files on the System

Section 14.8: Guided Exercise: Locating Files on the System

Section 14.9: Lab: Accessing Linux File Systems

Chapter 15: Using Virtualized Systems

Section 15.1: Managing a Local Virtualization Host

Section 15.2: Quiz: Managing a Local Virtualization Host

Section 15.3: Installing a New Virtual Machine

Section 15.4: Quiz: Installing a New Virtual Machine

Section 15.5: Quiz: Using Virtualized Systems

Chapter 16: Comprehensive Review

Section 16.1: Red Hat System Administration I Comprehensive Review

Section 16.2: Lab: Comprehensive Review

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Guided Exercise: Identify the Status of systemd Units

In this lab, you will identify installed and running services on the system.

Outcomes

A list of active and enabled services on the system.

Reset your serverX system.

List all service units on the system.

[student@serverX ~]$ systemctl list-units --type=service

List all socket units, active and inactive, on the system.

[student@serverX ~]$ systemctl list-units --type=socket --all

Explore the status of the chronyd service. This service is used for network time synchronization (NTP).
1. Display the status of the chronyd service. Note the process ID of any active daemons.
```
[student@serverX ~]$ systemctl status chronyd
```
2. Confirm that the listed daemons are running.
```
[student@serverX ~]$ ps -p PID
```
Explore the status of the sshd service. This service is used for secure encrypted communication between systems.
1. Determine if the sshd service is enabled to start at system boot.
```
[student@serverX ~]$ systemctl is-enabled sshd
```
2. Determine if the sshd service is active without displaying all of the status information.
```
[student@serverX ~]$ systemctl is-active sshd
```
3. Display the status of the sshd service.
```
[student@serverX ~]$ systemctl status sshd
```

List the enabled or disabled states of all service units.

[student@serverX ~]$ systemctl list-unit-files --type=service

Discuss Red Hat System Administration I

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RH124 Chapter 15 Lab 3: Install zsh Package

VictoriaB97

16 sty 2024

Hello,I am trying to finish up Lab 3 of the Chapter 15 Comprehensive Review Labs in RH124, and when I type in sudo dnf install zsh for the 6th specification of the lab, I get an error message basically saying that it failed to download metadata for the repo 'ansible-2.9-for-rhel-9-x86_64-rpms', and that they could not download repomd.xml. It provided a 404 status code.Can someone please let me know what the problem is, and if there is a current workaround? Thanks.

378

Red Hat System Administration I | Guided Exercise: Explain and Investigate RPM Software Pack

AbeHiero

10 lis 2023

I cannot start the lab with command: lab start software-rpm. I get this error:ModuleNotFoundError: No module named 'rhcsa-classroom'Script software-rpm not in course library rhcsa-classroom Anyone else see this?

172

Red Hat System Administration I (RH124)

Haley_Ruccio

19 lip 2023

The first of two courses covering the core system administration tasks needed to manage Red Hat Enterprise Linux serversRed Hat System Administration I (RH124) is designed for IT professionals without previous Linux system administration experience. The course provides students with Linux administration competence by focusing on core administration tasks. This course also provides a foundation for students who plan to become full-time Linux system administrators by introducing key command-line concepts and enterprise-level tools. This course is the first of a two-course series that takes a computer professional without Linux system administration knowledge to become a fully capable Linux administrator. These concepts are further developed in the follow-on course, Red Hat System Administration II (RH134).This course is based on Red Hat® Enterprise Linux 9.0.Course content summaryIntroduce Linux and the Red Hat Enterprise Linux ecosystem.Run commands and view shell environments.Manage, organize, and secure files.Manage users, groups and user security policies.Control and monitor systemd services.Configure remote access using the web console and SSH.Configure network interfaces and settings.Manage software using DNFAudience for this courseThe primary persona is a technical professional with current or pending responsibilities as a Linux enterprise or cloud system administrator.This course is popular in Red Hat Academy, and is targeted at the student who is planning to become a technical professional using Linux.Prerequisites for this courseBasic technical user skills with computer applications on some operating systems are expected.Take our free assessment to gauge whether this offering is the best fit for your skills.Technology considerationsThere are no special technical requirements for this course.This course is not designed for bring your own device (BYOD).Internet access is not required but is recommended so that students can research and browse Red Hat online resources.

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Revision: rh124-7-1b00421