Course Description

This GTU254 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 GTU199 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.

Red Hat® is a registered trademark of Red Hat, Inc. and its use by GuruTeam Ltd., Ireland does not imply association or sponsorship by Red Hat, Inc.

Supported Distributions:

Red Hat Enterprise Linux 7



4 days


Target Audience

This course is suitable for IT professionals who wish to further advance their existing Linux administration skills.


Course Prerequisites

Students should have skills equal to those taught in the following courses:

Also these prerequisite skills are taught in these courses:


Suggested Follow on Courses

There are a number of suitable follow-on courses depending on your business objectives. Why not contact us to discuss?


Course Content

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




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