GL134 - Red Hat Enterprise Linux Systems Admin II

The Red Hat Enterprise Linux System Administration II course builds upon the foundational skills acquired in the first administration course (GL124), diving deeper into more complex system administration tasks. This course is tailored for IT professionals looking to enhance their skills in managing Red Hat Enterprise Linux environments by covering advanced topics such as shell scripting, managing SELinux security, and working with network-attached storage. By focusing on real-world applications, the course ensures that participants are well-equipped to handle the intricacies of enterprise-level system administration.

Participants will engage in hands-on labs that reinforce the theoretical knowledge presented, offering practical experience in areas like automating tasks with cron and systemd timers, managing logical volumes with LVM, and configuring and troubleshooting the Linux boot process. These exercises are designed to mirror the challenges faced in a professional setting, making this course invaluable for those seeking to deepen their understanding and capability in Linux system administration.

Completing this course not only prepares individuals for advanced certifications but also enhances their ability to contribute to their organization's IT infrastructure. With a focus on both security and efficiency, this course is essential for professionals aiming to manage complex Linux environments and ensure the stability and security of their systems.

The Red Hat Enterprise Linux (RHEL) system administration topics covered in this course along with the GL124 course cover the certification objects of the Red Hat Certified System Administrator (RHCSA) exam.

Benefits:

  1. Advanced Skill Development: Gain deeper expertise in managing and securing Red Hat Enterprise Linux systems.
  2. Enhanced Security Knowledge: Learn to implement and troubleshoot SELinux, enhancing your organization’s security posture.
  3. Increased Efficiency: Master automation tools like cron and systemd, streamlining repetitive tasks and improving productivity.
  4. Real-World Application: Engage in hands-on labs that simulate complex, real-world challenges, preparing you for enterprise environments.
  5. Career Progression: Strengthen your qualifications for higher-level roles in system administration and IT management.

Audience:

  1. Senior System Administrators: Advanced professionals responsible for managing and securing complex Linux environments.
  2. DevOps Engineers: Engineers who integrate and automate processes within Linux systems, focusing on scalability and efficiency.
  3. IT Security Specialists: Experts focused on enhancing the security posture of Linux systems, particularly through SELinux and other security measures.
  4. Cloud Infrastructure Engineers: Professionals managing cloud-based Linux systems, ensuring robust and scalable infrastructure.
  5. Network Engineers: Specialists responsible for configuring and maintaining Linux-based network services and storage solutions.

Current Version: R9-D00

Red Hat® is a registered trademark of Red Hat, Inc. and its use by Guru Labs, L.C. does not imply association or sponsorship by Red Hat, Inc.

Prerequisites:

Completion of or skills equal to the GL124 "Linux Systems Administration I" course.

Supported Distributions:
Red Hat Enterprise Linux 9
Course Outline:
  1. Introduction to Shell Scripting
    1. Shell Script Strengths and Weaknesses
    2. Example Shell Script
    3. Positional Parameters
    4. Input & Output
    5. Doing Math
    6. Exit Status
    7. Comparisons with test
    8. Conditional Statements
    9. Flow Control: case
    10. The borne for-Loop
    11. The while and until Loops
    Lab Tasks
    1. Writing a Shell Script
  2. Use regular expressions with grep
    1. Searching Inside Files
    2. Regular Expression Overview
    3. Regular Expression Implementations
    4. Regular Expressions
    5. RE Character Classes
    6. Regex Quantifiers
    7. RE Parenthesis
    Lab Tasks
    1. Pattern Matching with Regular Expressions
    2. Extended Regular Expressions
    3. Using Regular Expressions With sed
  3. Schedule future Linux tasks
    1. Automating Tasks
    2. at/batch
    3. cron
    4. The crontab Command
    5. crontab Format
    6. /etc/cron.*/ Directories
    7. Anacron
    8. Systemd Timers
    Lab Tasks
    1. Creating and Managing User Cron Jobs
    2. Adding System cron Jobs
  4. Manage priority of Linux processes
    1. Viewing Processes
    2. Managing Processes
    3. Tuning Process Scheduling
    Lab Tasks
    1. Process Management Basics
  5. Control access to files with access control lists (ACL)
    1. File and Directory Permissions
    2. File Access Control Lists
    3. Manipulating FACLs
    4. Viewing FACLs
    5. Backing Up FACLs
    Lab Tasks
    1. Using Filesystem ACLs
  6. Manage SELinux security
    1. SELinux Security Framework
    2. SELinux Modes
    3. SELinux Commands
    4. Choosing an SELinux Policy
    5. SELinux Booleans
    6. Permissive Domains
    7. SELinux Policy Tools
    8. SELinux Troubleshooting
    Lab Tasks
    1. Exploring SELinux Modes
    2. SELinux File Contexts
  7. Connect to network-defined users and groups
    1. RHEL DS Client Configuration
    2. System Security Services Daemon (SSSD)
    Lab Tasks
    1. Using LDAP for Centralized User Accounts
  8. Add disks, partitions, and file systems to a Linux system
    1. Partitioning Disks with fdisk & gdisk
    2. Resizing a GPT Partition with gdisk
    3. Partitioning Disks with parted
    4. Non-Interactive Disk Partitioning with sfdisk
    5. Filesystem Creation
    6. Filesystem Maintenance
    7. Managing an XFS Filesystem
    8. Swap
    Lab Tasks
    1. Creating and Managing Filesystems
    2. Hot Adding Swap
  9. Manage logical volume management (LVM) storage
    1. Logical Volume Management
    2. Implementing LVM
    3. Creating Logical Volumes
    4. Activating LVM VGs
    5. Exporting and Importing a VG
    6. Examining LVM Components
    7. Changing LVM Components
    8. Advanced LVM Overview
    9. Advanced LVM: Components & Object Tags
    10. Advanced LVM: Automated Storage Tiering
    11. Advanced LVM: Thin Provisioning
    12. Advanced LVM: Striping & Mirroring
    13. Advanced LVM: RAID Volumes
    Lab Tasks
    1. Creating and Managing LVM Volumes
  10. Access and manage network attached storage
    1. File Sharing via NFS
    2. NFSv4+
    3. NFS Clients
    4. NFS
    5. NFS Server Configuration
    6. Accessing Windows/Samba Shares from Linux
    7. AutoFS
    8. AutoFS Configuration
    Lab Tasks
    1. NFS Server Configuration
    2. Using autofs
  11. Control and troubleshoot the Red Hat Enterprise Linux boot process
    1. Booting Linux on PCs
    2. GRUB 2
    3. GRUB 2 Configuration
    4. The Boot Loader Specification
    5. GRUB 2 Security
    6. Boot Parameters
    7. Initial RAM Filesystem
    8. System Boot Method Overview
    9. init
    10. systemd Targets
    11. Systemd local-fs.target and sysinit.target
    12. Systemd basic.target and multi-user.target
    13. System Configuration Files
    14. Shutdown and Reboot
    15. Linux Runlevels Aliases
    Lab Tasks
    1. Boot Process
    2. Booting directly to a bash shell
    3. GRUB Command Line
    4. Basic GRUB Security
    5. Troubleshooting Practice: Boot Process
  12. Linux network communication with firewall
    1. Netfilter: Stateful Packet Filter Firewall
    2. Netfilter Concepts
    3. nftables
    4. NFT: Tables
    5. NFT: Chains
    6. NFT: Rules
    7. Netfilter Rule Syntax
    8. Rule Counters
    9. Targets
    10. FirewallD
    Lab Tasks
    1. Securing Services with Netfilter
    2. FirewallD
  13. Container Technology Overview
    1. Container Fundamentals
    2. Daemonless Containers
    3. Podman
    4. Podman Configuration
    5. Podman Images
    6. Podman Volumes
    7. Podman Networking
    8. Rootless Podman
    9. Podman and Pods
    10. Building Images with Buildah
    11. Managing Images with Skopeo
    Lab Tasks
    1. Podman
    2. Podman Networking
    3. Podman and Pods
  14. Installing RHEL
    1. Anaconda: An Overview
    2. Anaconda: Booting the System
    3. Anaconda: Common Boot Options
    4. Anaconda: Loading Anaconda and Packages
    5. Anaconda: Storage Options
    6. Anaconda: Troubleshooting
    7. Kickstart
    Lab Tasks
    1. Linux Installation
    2. Automating Installation with Kickstart
  15. Installing RHEL
    1. Anaconda: An Overview
    2. Anaconda: Booting the System
    3. Anaconda: Common Boot Options
    4. Anaconda: Loading Anaconda and Packages
    5. Anaconda: Storage Options
    6. Anaconda: Troubleshooting
    7. Kickstart
    Lab Tasks
    1. Linux Installation
    2. Automating Installation with Kickstart
  16. Comprehensive review
    1. System Administration II
    Lab Tasks
    1. Understand And Use Essential Tools
    2. Operate Running Systems
    3. Configure Local Storage and Filesystems
    4. Users, Groups, and File Permissions
    5. Maintenance and Recovery
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