Linux Engineer & RHCE

Definition and Purpose

DNS Components and Terminology

DNS Resolution Process

DNS Record Types

DNS Management and Troubleshooting

Install BIND on Servers

Configure Local File

Create Forward Zone File

Configure Secondary DNS Server

Configure replication between master and slave servers.

Installing MariaDB

SQL database structure

CRUD Operations

Grant Privileges

Database Backup and Recovery

Introduction to Email Communication

DNS Records for Email Flow

Email Components and Terminology

Email Flow Process

Email Protocols and Standards

Email Security

Case Studies and Practical Applications

Install Required Packages

Create records for domain in DNS

Prepare database for mail server.

Configure Postfix

Configure Dovecot

Install and configure email client

About app server, difference between webserver

What is the tomcat

Describe single and multi instance

Tomcat directory structure

Deploying application

Write scripts to start , stop, restart instances.

Introduction to Certificate Authorities (CAs)

Key Concepts in Public Key Infrastructure (PKI)

Types of Digital Certificates

Components of a Certificate Authority

SSL/TLS Handshake Process

Encrypting and Decrypting Process

CA Hierarchy and Chain of Trust

Certificate Issuance Process

Security Best Practices for CAs

Revocation and Certificate Lifecycle

Setting Up OpenSSL Environment

Generating Key Pairs and Digital Certificates

Creating Certificate Signing Requests (CSRs)

Setting Up a Simple Certificate Authority Hierarchy

Digital Signature and Verification

Revocation and Certificate Management

Integration with Applications and Services

Introduction to Apache HTTP Server

Differences Between Apache and Nginx

Installation and Setup

Apache Architecture and Components

Understanding the Default Configuration

Virtual Hosts

Logging and Monitoring

Setting Up the Environment

Basic Configuration and "Hello World" Page

Create Additional Virtual Hosts

Enable and Configure SSL/TLS

URL Rewriting

Implementing Access Restrictions

Load Balancing and Proxying

Integration with Other Services(MySQL and PHP, LAMP)

Introduction to Nginx

Installation and Setup Reverse Proxy

Understanding Proxy

Hello World with Nginx

Server Blocks and Virtual Hosts

SSL/TLS Configuration

Load Balancing

Integration with Other Services(MySQL and PHP, LEMP)

Introduction to HAProxy

Installation and Setup

Logging and Error Handling

Backend Servers and Server Pools

Advanced Load Balancing Techniques

Health Checks and Monitoring

Security Best Practices

Case Studies and Real-world Applications

Introduction to Linux Failover Clusters and iSCSI

iSCSI Components Explained (Initiator, Target, Initiator IQN)

Setting Up Block Storage Server with iSCSI

Configuring iSCSI Initiators on Cluster Nodes

Creating Failover Cluster Nodes

Creating a Failover Cluster (corosync , pacemaker )

Creating MySQL cluster on Linux Failover Cluster

Testing Failover Scenarios

Troubleshooting and Debugging

Linux performance monitoring

File system and statistic tools

Network monitoring tools

Practice and troubleshoot real case

Introduction to Advanced Bash Scripting

Advanced Script Structure

Regular Expressions in Bash

Using grep, sed, and awk for pattern matching

Working with Files and Directories

Advanced Input/Output Handling

Error Handling and Debugging

Advanced Control Flow

Best Practices in Advanced Bash Scripting

Introduction to Log Management

Logging Fundamentals (Syslog, JSON)

Introduction to Other Log Management Tools (Elasticsearch, Logstash, Kibana)

Introduction to Graylog

Installing and Configuring Graylog

Graylog Components (Graylog Server, MongoDB, Elasticsearch )

Configuring Log Inputs

Alerting in Graylog

Log Analysis Best Practices

Introduction to Monitoring

Zabbix Overview

Installing and Configuring Zabbix

Zabbix Components (Zabbix Server, Zabbix Frontend , Zabbix Database (MySQL ) )

Configuring Hosts in Zabbix

Monitoring with Zabbix Agents

Zabbix Templates and Macros

Zabbix Discovery Rules

Graphs and Screens in Zabbix

Zabbix Triggers and Actions

Notifications

What is Ansible

Why Ansible?

Key Concepts (Inventory, Modules, Tasks )

Installation and Setup

Ad-Hoc Commands

Basic modules

Yum and yum_repository modules

Exam tips, use bash script to run adhoc command

Understanding YAML language syntax

Define Your Project Structure

Running the first simple playbook

Effectively use ansible-doc

Introduction to Ansible Navigator

Setting Up the Ansible Navigator Environment

Managing Inventories with Ansible Navigator

Advanced Ansible Navigator Features

Creating, declarations and using variables

Using facts in Playbooks

Ansible setup module

Using arrays as variables

Exercise 1: Basic Ansible Commands

Exercise 2: Ansible Playbooks Basics

Exercise 3: Variables and Facts

Exercise 4: Run ad-hoc Ansible commands to perform simple tasks on remote hosts.

Introducing ansible vault

Managing encrypted eile

Playbooks and ansible vault

Using Loops

Conditional running plays

Working with fails, blocks

Understanding Jinja2.

Template Module

Exam tips and practice

Describing files modules.

Modifying and copying files to hosts

Exam tips and practice

Exercise 1: Basic Task Control in Ansible

Exercise 2: Working with Templates in Ansible

Exercise 3: Managing Secrets with Ansible Vault

Selecting hosts with host

Configuring parallelism

Including and importing files

Describe user module

Change password , Group management

Describing role structure

Reusing content with system roles

Creating roles

Deploying roles with ansible galaxy

Describing role structure

Managing software and subscriptions

Managing the boot process and scheduled processes

Managing network configuration

The lvg and lvol Modules

The filesystem Module

The mount Module

Log files for ansible

The debug module

Managing errors

Exercise 1: Ansible Galaxy

Exercise 2: Ansible Roles

Exercise 3: Automate disk management

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