
RHCSA Red Hat Enterprise Linux 9 Certification Study Guide, Eighth Edition (Exam EX200)
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Content
- 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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The file format PDF always displays a book page identically on any hardware. This makes PDF suitable for complex layouts such as those used in textbooks and reference books (images, tables, columns, footnotes). Unfortunately, on the small screens of e-readers or smartphones, PDFs are rather annoying, requiring too much scrolling.
This eBook uses Adobe-DRM, a „hard” copy protection. If the necessary requirements are not met, unfortunately you will not be able to open the eBook. You will therefore need to prepare your reading hardware before downloading.
Please note: We strongly recommend that you authorise using your personal Adobe ID after installation of any reading software.
For more information, see our eBook Help page.