RHCSA Red Hat Enterprise Linux 9 Certification Study Guide, Eighth Edition (Exam EX200)

Name: RHCSA Red Hat Enterprise Linux 9 Certification Study Guide, Eighth Edition (Exam EX200)
Brand: McGraw Hill LLC
Price: 102.99 EUR
Availability: OnlineOnly

Michael Jang Alessandro Orsaria(Autor*in)

McGraw Hill LLC (Verlag)

1. Auflage

Erschienen am 20. Dezember 2023

528 Seiten

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978-1-260-46208-1 (ISBN)

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Inhalt

Intro
Cover
Title Page
Copyright Page
Dedication
About the Authors
Contents at a Glance
Contents
Acknowledgments
Preface
Introduction
RHCSA Exam Readiness Checklist
1 Prepare for the Red Hat RHCSA Certification
The RHCSA Exam
The Exam Experience
Evolving Requirements
Basic Hardware Requirements
Hardware Compatibility
Architectures
RAM Requirements
Storage Options
Networking
Virtual Machine Options
Get Red Hat Enterprise Linux
Get a Subscription at No Cost
Purchase a Subscription
Third-Party Rebuilds
Check the Download
Exercise 1-1: Get Red Hat Enterprise Linux
An Environment for Practice Labs
System Roles
Getting VMware Workstation Player
Virtual Networks on a Hypervisor
Configure a Virtual Machine on VMware Workstation Player
RHEL 9 Installation
Boot Media
Basic Installation Steps
The Installation Perspective on Partitions
Partition Creation Exercise
Exercise 1-2: Partitioning During Installation
Wow, Look at All That Software!
Baseline Packages
During the Installation
Initial Setup
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
2 Fundamental Command-Line Skills
Shells
Other Shells
Virtual Consoles
GUI Shell Interfaces
Differences Between Regular and Administrative Users
Standard Streams and Command Redirection
Standard Command-Line Tools
File and Directory Concepts
File Lists and ls
File-Creation Commands
Wildcards
File Searches
File Permissions
File Permissions and Ownership
Commands to Change Permissions and Ownership
A Basic Introduction of User and Group Concepts
Managing Text Files
Commands to Read Text Streams
Commands to Process Text Streams
Edit Text Files at the Console
Exercise 2-1: Using vi to Create a New User
If You Don't Like vi
Edit Text Files in the GUI
Accessing the Documentation
When You Need Help
A Variety of man Pages
The info Manuals
Detailed Documentation in /usr/share/doc
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
3 Managing Basic Networking
A Networking Primer
IPv4 Networks
Networks and Routing
Tools and Commands
Network Configuration and Troubleshooting
Network Configuration Services
Network Configuration Tools
Exercise 3-1: Configure IPv4 Settings on a Network Interface
Configure Name Resolution
Hostname Configuration Files
An Introduction to IPv6
Basic IPv6 Addressing
Troubleshooting Tools
Configure IPv6 Addresses
Administration with Secure Shell and Secure Copy
Command-Line Access
More SSH Command-Line Tools
Graphical Secure Shell Access
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
4 Software Management
The RPM Package Manager
What Is a Package?
What Is the RPM Database?
What Is a Repository?
Install an RPM Package
Uninstall an RPM Package
Install RPMs from Remote Systems
RPM Installation Security
Updating the Kernel
More RPM Commands
Package Queries
Package Signatures
File Verification
Exercise 4-1: Practice with rpm Commands
Dependencies and the dnf Command
An Example of Dependency Hell
Relief from Dependency Hell
Red Hat Subscription Management
Exercise 4-2: Subscribe a System to Red Hat Subscription Management
Basic dnf Configuration
Exercise 4-3: Create a dnf Repository from the RHEL 9 DVD
Third-Party Repositories
Exercise 4-4: Configure Access to the EPEL Repository
Basic dnf Commands
Installation Mode
Security and dnf
Updates and Security Fixes
Package Groups and dnf
More dnf Commands
Module Streams (*)
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
5 systemd and the Boot Process
The Boot Process
Basic System Configuration
Startup Menus
Access to Linux Bootloaders
Bootloaders and GRUB 2
GRUB, the GRand Unified Bootloader
Exercise 5-1: Boot into a Different Target
Exercise 5-2: Recover the Root Password
Modify the System Bootloader
How to Update GRUB 2
The GRUB 2 Command Line
Exercise 5-3: Using the GRUB 2 Command Line
An Option for Booting from GRUB 2: Rescue Mode
Between GRUB 2 and Login
Kernels and the Initial RAM Disk
The First Process, Targets, and Units
Switch Between Targets
Reboot and Shut Down a System Normally
systemd Replaces Upstart and SysVinit
systemd Units
Virtual Consoles and Login Screens
Control by Target
Functionality by Target
The Innards of systemd Units
Service Configuration
Time Synchronization
Time Zone Configuration
Sync the Time with chronyd
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
6 User Administration
User Account Management
Different Kinds of Users
The Shadow Password Suite
Command-Line Tools
Exercise 6-1: Add a User with Cockpit Web Console
Exercise 6-2: Real and Fake Shells
Modify an Account
Administrative Control
The Ability to Log In
The su Command
Limit Access to su
The sg Command
Superuser Access with the sudo Command
User and Shell Configuration
Home Directories and /etc/skel
Exercise 6-3: Another Way to Secure a System
Shell Configuration Files in User Home Directories
Login, Logout, and User Switching
Special Groups
Standard and Red Hat Groups
Shared Directories
Exercise 6-4: Control Group Ownership with the SGID Bit
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
7 Storage and Filesystem Administration
Storage Management and Partitions
Current System State
The fdisk Utility
The gdisk Utility
The parted Utility
Using parted: Starting, Getting Help, and Quitting
Graphical Options
Exercise 7-1: Work with fdisk and parted
Filesystem Formats
Standard Filesystems
Journaling Filesystems
Filesystem Format Commands
Swap Volumes
Filesystem Check Commands
Exercise 7-2: Format, Check, and Mount Different Filesystems
Basic Linux Filesystems and Directories
Separate Linux Filesystems
Directories That Can Be Mounted Separately
Logical Volume Manager (LVM)
Definitions in LVM
Create a Physical Volume
Create a Volume Group
Create a Logical Volume
Make Use of a Logical Volume
More LVM Commands
Remove a Logical Volume
Resize Logical Volumes
Filesystem Management
The /etc/fstab File
Universally Unique Identifiers in /etc/fstab
The mount Command
More Filesystem Mount Options
Virtual Filesystems
Add Your Own Filesystems to /etc/fstab
Removable Media and /etc/fstab
Network Filesystems
The Automounter
Mounting via the Automounter
Exercise 7-3: Configure the Automounter
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
8 Linux Security
Basic Firewall Control
Standard Ports
The firewalld Service
Exercise 8-1: Adjust Firewall Settings
Exercise 8-2: Firewall Configuration with the Cockpit Web Console
Securing SSH with Key-Based Authentication
SSH Configuration Commands
SSH Client Configuration Files
Basic Encrypted Communication
Set Up a Private/Public Pair for Key-Based Authentication
A Security-Enhanced Linux Primer
Basic Features of SELinux
SELinux Status
SELinux Configuration at the Command Line
Configure Basic SELinux Settings
Configure Regular Users for SELinux
Manage SELinux Boolean Settings
List and Identify SELinux File Contexts
Restore SELinux File Contexts
Exercise 8-3: Configure a New Directory with Appropriate SELinux Contexts
SELinux Port Labeling
Identify SELinux Process Contexts
Diagnose and Address SELinux Policy Violations
The GUI SELinux Administration Tool
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
9 System Administration Tasks
Resource Management and System Tuning
System Resource Management Commands
System Tuning Profiles
Archives and Compression
gzip and bzip2
tar
star
Running Tasks on a Schedule: cron and at
The System crontab and Components
Hourly cron Jobs
Regular anacron Jobs
Setting Up cron for Users
Exercise 9-1: Create a cron Job
Running a Job with the at System
Secure cron and at
Bash Scripts
A "Hello, World" Script
Bash Variables
Bash Control Structures
Exercise 9-2: Create a Script
Local Log Files
System Log Configuration File
Log File Management
A Variety of Log Files
Service-Specific Logs
Exercise 9-3: Learn the Log Files
View systemd Journal Log Entries
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
10 An Introduction to Containers
Fundamentals of Container Technology
The Rise of Container Technologies
Virtualization and Containers
Understanding Container Architecture
Docker and Podman
Getting Started with Containers
Installing Container Tools
Running Your First Container
Rootless and Rootful Containers
Building and Using Container Images
Image Registries
Building Container Images: A Primer
Exercise 10-1: Building and Running a Container Image
Exercise 10-2: Uploading an Image to Quay.io
Managing Containers
Podman Commands
Running a Container as a SystemD Service
Exercise 10-3: Running a Container as a Service
Persistent Storage
Exercise 10-4: Attaching Persistent Storage to a Container
Certification Summary
Two-Minute Drill
Q&A Self Test
Lab Questions
Self Test Answers
Lab Answers
A Prepare a System for the Sample Exams
Sample Exam System Requirements
B Solutions to RHCSA Sample Exam 1
RHCSA Sample Exam 1 Discussion
C Solutions to RHCSA Sample Exam 2
RHCSA Sample Exam 2 Discussion
D About the Online Content
Single User License Terms and Conditions
Downloadable Book Resources
Lab Files
Appendix A: Prepare a System for the Sample Exams
Sample Exams
Technical Support
Index

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