GL254 - Red Hat Enterprise Linux Systems Administration III

Upcoming GL254 Classes

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This GL254 course is designed to follow an identical set of topics as the Red Hat® RH254, RH255 RHCE exam prep courses with the added benefit of very comprehensive lab exercises and detailed lecture material.

The Red Hat Enterprise Linux (RHEL) system administration topics covered in this course along with the GL199 course cover the certification objects of the Red Hat Certified Engineer (RHCE) exam.

This course builds upon a foundation of core Linux systems administration principles and skills. Students will advance their Linux systems administration knowledge. The course will focus on helping students optimize system administration skills using automation techniques and deploy commonly used network services. Once this course is completed students will know how to deploy critical network services in a secure fashion.

Current Version: C01


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.


Students should have skill equal to those taught in the GL124 "Red Hat Enterprise Linux Systems Admin I" and GL134 "Red Hat Enterprise Linux Systems Admin I" courses. Also these prerequisite skills are taught in the GL120 "Linux Fundamentals" and GL250 "Enterprise Linux Systems Administration" courses.

Supported Distributions:

Red Hat Enterprise Linux 7

Course Outline:

  1. Linux Kernel & Devices
    1. Hardware Discovery Tools
    2. Kernel Hardware Info /sys/
    3. /sys/ Structure
    4. udev
    5. Managing Linux Device Files
    6. List Block Devices
    7. SCSI Devices
    8. USB Devices
    9. USB Architecture
    10. Kernel Modules
    11. Configuring Kernel Components and Modules
    12. Handling Module Dependencies
    13. Configuring the Kernel via /proc/
    14. Console
    15. Virtual Terminals
    16. Keyboard & locale configuration
    17. Serial Ports
    18. Random Numbers and /dev/random
    Lab Tasks
    1. Adjusting Kernel Options
    2. Introduction to Troubleshooting Labs
    3. Troubleshooting Practice: Kernel Modules
  2. Control Services and Daemons
    1. systemd System and Service Manager
    2. systemd Targets
    3. Using systemd
    4. Legacy Support for SysV init
    Lab Tasks
    1. Managing Services With Systemd's systemctl
    2. Creating a systemd unit file
    3. Troubleshooting Practice: Boot Process
  3. Manage IPv6 Networking
    1. IPv6
    Lab Tasks
    1. Configuring IPv6
  4. Configure Link Aggregation and Bridging
    1. Interface Aggregation
    2. Interface Bonding
    3. Network Teaming
    4. Interface Bridging
  5. Control Network Port 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. FirewallD
    Lab Tasks
    1. Firewall Configuration
    2. FirewallD
  6. Manage DNS for Servers
    1. Server Roles
    2. Resolving Names
    3. Resolving IP Addresses
    4. Basic BIND Administration
    5. Configuring the Resolver
    6. Testing Resolution
    7. BIND Configuration Files
    8. named.conf Syntax
    9. named.conf Options Block
    10. Creating a Site-Wide Cache
    11. rndc Key Configuration
    12. Address Match Lists & ACLs
    13. Restricting Queries
    Lab Tasks
    1. Configuring a Slave Name Server
    2. Use rndc to Control named
  7. Configure Email Delivery
    1. SMTP
    2. SMTP Terminology
    3. SMTP Architecture
    4. SMTP Commands
    5. SMTP Extensions
    6. SMTP Session
    7. Postfix Features
    8. Postfix Architecture
    9. Postfix Components
    10. Postfix Configuration
    13. Configuration Commands
    Lab Tasks
    1. Configuring Postfix
    2. Postfix Virtual Host Configuration
    3. Postfix Network Configuration
  8. Provide Block-based Storage
    1. Remote Storage Overview
    2. Remote Block Device Protocols
    3. iSCSI Architecture
    4. Open-iSCSI Initiator Implementation
    5. iSCSI Initiator Discovery
    6. iSCSI Initiator Node Administration
    7. Mounting iSCSI Targets at Boot
    8. iSCSI Multipathing Considerations
    Lab Tasks
    1. iSCSI Initiator Configuration
  9. Provide File-based Storage
    1. Remote Filesystem Protocols
    2. File Sharing via NFS
    3. NFSv4+
    4. NFS Clients
    5. NFS Server Configuration
    6. Implementing NFSv4
    7. Accessing Windows/Samba Shares from Linux
    Lab Tasks
    1. NFS Server Configuration
  10. Configure MariaDB Databases
    1. Popular SQL Databases
    2. MariaDB
    3. MariaDB Installation and Security
    4. MariaDB User Account Management
    Lab Tasks
    1. Installing and Securing MariaDB
  11. Provide Apache HTTPD Web Services
    1. HTTP Operation
    2. Apache Architecture
    3. Apache Configuration Files
    4. httpd.conf Server Settings
    5. httpd.conf Main Configuration
    6. HTTP Virtual Servers
    7. Virtual Hosting DNS Implications
    8. httpd.conf VirtualHost Configuration
    9. Port and IP based Virtual Hosts
    10. Name-based Virtual Host
    11. TLS Using
    12. Dynamic HTTP Content
    Lab Tasks
    1. Apache Architecture
    2. Apache Content
    3. Configuring Virtual Hosts
    4. Using TLS Certificates with Apache
    5. CGI Scripts in Apache
  12. Write Bash Scripts
    1. Shell Script Strengths and Weaknesses
    2. Example Shell Script
    3. Positional Parameters
    4. Input & Output
    5. Comparisons with test
    6. Exit Status
    7. Conditional Statements
    8. Flow Control: case
    9. The for Loop
    10. The while and until Loops
    Lab Tasks
    1. Writing a Shell Script
  13. Configure the Shell Environment
    1. Shells
    2. Identifying the Shell
    3. Changing the Shell
    4. Configuration Files
    5. Script Execution
    6. Shell Prompts
    7. Bash: Bourne-Again Shell
    8. Bash: Configuration Files
    9. Bash: Command Line History
    10. Bash: Command Editing
    11. Bash: Command Completion
    12. Bash: prompt
    Lab Tasks
    1. Linux Shells
    2. Bash History
    3. Aliases
    4. Bash Login Scripts
  14. Linux Containers Preview
    1. Application Management Landscape
    2. Application Isolation
    3. Container Resource Control & Security
    4. Container Types
    5. Container Ecosystem
    Lab Tasks
    1. Container Concepts LXC
    2. Container Concepts Systemd