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System Administration and IT Infrastructure Services Course
More than 2 million learners worldwide

System Administration and IT Infrastructure Services Course

Master the full stack of system administration — from Linux command-line fundamentals and network configuration to security hardening, high availability, and cloud operations. This course equips IT professionals with the hands-on skills employers demand, covering real-world tools like Ansible, Prometheus, Kubernetes, and Terraform. Build the technical foundation and operational mindset to manage enterprise infrastructure with confidence.

Dedika for businesses

What you will learn:

  • Configure and manage Linux and Windows servers in enterprise environments.

  • Design secure, redundant network architectures using firewalls, VLANs, and load balancers.

  • Implement identity and access management with Active Directory, LDAP, and MFA.

  • Automate server provisioning and configuration at scale with Ansible and Docker.

  • Build production-grade monitoring pipelines using Prometheus, Grafana, and centralized logging.

  • Develop and execute disaster recovery plans that meet defined RTO and RPO targets.

How you study in a practical way System Administration and IT Infrastructure Services Course

How you practice System Administration and IT Infrastructure Services Course

For companies who want to train their team

With Dedika for businesses, the course includes exercises and examples tailored to your own business and the way your company needs.

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Course content

8 Chapters • 40 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Foundations of System Administration

  • Lesson 1 • The Sysadmin Role and Mindset

    Defines the scope of system administration across enterprise and SMB contexts. Establishes professional expectations that frame every subsequent chapter.

  • Lesson 2 • Linux Command-Line Essentials

    Covers filesystem navigation, file manipulation, and process management in Linux. Provides the CLI fluency required for all server-side tasks ahead.

  • Lesson 3 • Hardware and Virtualization Concepts

    Explains physical server components, RAID levels, and hypervisor types. Grounds students in the hardware layer before moving to software-defined infrastructure.

  • Lesson 4 • IT Infrastructure Service Models

    Compares on-premises, colocation, and cloud delivery models for IT services. Sets strategic context for architectural decisions covered in later chapters.

  • Lesson 5 • Windows Server Administration Basics

    Introduces Windows Server roles, PowerShell fundamentals, and the GUI vs. CLI tradeoff. Prepares students for mixed-OS environments common in enterprise settings.

Chapter 2See details

Networking for System Administrators

  • Lesson 1 • Switching, Routing, and VLANs

    Explains Layer 2 switching, Layer 3 routing, and VLAN segmentation for network isolation. Prepares students to collaborate with network teams on infrastructure design.

  • Lesson 2 • Firewall and Network Access Control

    Introduces stateful firewalls, ACLs, and network segmentation strategies. Connects network security to the broader security posture built in later chapters.

  • Lesson 3 • Network Troubleshooting Methodology

    Applies a structured OSI-layer approach to diagnosing connectivity failures. Students practice with ping, traceroute, tcpdump, and Wireshark captures.

  • Lesson 4 • Core Network Protocols and Services

    Covers DNS, DHCP, NTP, and HTTP/S as foundational services every sysadmin manages. Students trace request flows to understand service dependencies.

  • Lesson 5 • TCP/IP and Subnetting Fundamentals

    Teaches IP addressing, CIDR notation, and subnet calculation from first principles. Networking literacy here underpins every infrastructure service in the course.

Chapter 3See details

Storage and File System Management

  • Lesson 1 • RAID and Redundant Storage

    Explains software and hardware RAID implementation, monitoring, and recovery. Prepares students to maintain data availability during disk failures.

  • Lesson 2 • Backup Strategies and Recovery Testing

    Defines full, incremental, and differential backup strategies with retention policies. Students execute and verify restores to validate backup integrity.

  • Lesson 3 • Network-Attached and SAN Storage

    Introduces NFS, SMB/CIFS, iSCSI, and Fibre Channel as shared storage protocols. Students configure NFS exports and iSCSI targets for multi-host access.

  • Lesson 4 • Logical Volume Management

    Teaches LVM concepts including physical volumes, volume groups, and logical volumes. Enables flexible, non-disruptive storage resizing in production Linux systems.

  • Lesson 5 • Disk Partitioning and File Systems

    Covers MBR vs. GPT partitioning, common file system types, and formatting workflows. Establishes the storage foundation for all server provisioning tasks.

Chapter 4See details

User, Identity, and Access Management

  • Lesson 1 • Local User and Group Administration

    Covers user account creation, password policies, and group membership on Linux and Windows. Builds the access control foundation extended by directory services later.

  • Lesson 2 • Role-Based Access Control Design

    Teaches RBAC principles, permission inheritance, and access review processes. Connects identity governance to compliance requirements discussed in supplementary chapters.

  • Lesson 3 • Authentication Protocols and Standards

    Covers Kerberos, NTLM, RADIUS, and SAML as enterprise authentication mechanisms. Students trace authentication flows to diagnose login failures.

  • Lesson 4 • Active Directory and LDAP Services

    Explains AD domain structure, organizational units, and LDAP directory queries. Students join Linux hosts to an AD domain and manage objects via CLI and GUI.

  • Lesson 5 • Multi-Factor Authentication Deployment

    Covers TOTP, hardware tokens, and push-based MFA integration with directory services. Students configure MFA enforcement policies for administrative accounts.

Chapter 5See details

Server Provisioning and Configuration Management

  • Lesson 1 • Infrastructure as Code Principles

    Introduces IaC concepts, idempotency, and declarative vs. imperative approaches. Establishes the philosophy behind all configuration management tools covered next.

  • Lesson 2 • Configuration Management with Ansible

    Teaches Ansible inventory, playbooks, roles, and variable management for Linux and Windows. Students automate multi-host configuration tasks with reusable role structures.

  • Lesson 3 • Operating System Installation and Kickstart

    Covers manual and automated OS installation using PXE boot and kickstart files. Automation here eliminates manual errors and accelerates server provisioning.

  • Lesson 4 • Secrets and Credential Management

    Introduces secrets vaults, environment variable injection, and credential rotation workflows. Secure secret handling is essential before deploying automated pipelines.

  • Lesson 5 • Containerization with Docker

    Covers Docker image building, container lifecycle, networking, and volume management. Containers extend provisioning skills to application-layer deployment scenarios.

Chapter 6See details

Monitoring, Logging, and Observability

  • Lesson 1 • Alerting Design and On-Call Workflows

    Covers alert threshold design, severity classification, and on-call rotation tooling. Well-designed alerts reduce noise and accelerate mean time to resolution.

  • Lesson 2 • Centralized Log Management

    Teaches syslog, journald, and log shipping to a centralized aggregation platform. Centralized logs enable cross-host correlation required for incident investigation.

  • Lesson 3 • Prometheus and Grafana Stack

    Covers Prometheus scraping, PromQL queries, and Grafana dashboard construction. Students build a working monitoring stack for a multi-server lab environment.

  • Lesson 4 • Monitoring Fundamentals and Metrics

    Defines the four golden signals and key infrastructure metrics for CPU, memory, disk, and network. Metric selection here drives the alerting strategy built throughout the chapter.

  • Lesson 5 • Capacity Planning with Observability Data

    Uses historical metrics to forecast resource exhaustion and plan infrastructure growth. Students produce a capacity report from real monitoring data collected in the lab.

Chapter 7See details

Security Hardening and Patch Management

  • Lesson 1 • Security Baseline and Hardening Standards

    Introduces CIS Benchmarks and STIG-style hardening checklists for OS configuration. Baseline standards provide the measurable security target for all hardening tasks.

  • Lesson 2 • Audit Logging and Compliance Evidence

    Configures auditd rules to capture privileged actions and generate compliance evidence. Audit trails support both internal reviews and external regulatory assessments.

  • Lesson 3 • Host-Based Security Controls

    Covers SELinux, AppArmor, host-based firewalls, and file integrity monitoring tools. These controls limit blast radius when perimeter defenses are bypassed.

  • Lesson 4 • Vulnerability Scanning and Remediation

    Covers authenticated vulnerability scanning, CVSS scoring, and remediation prioritization. Students run scans, triage findings, and apply fixes in a lab environment.

  • Lesson 5 • Patch Management Lifecycle

    Defines patch classification, testing, staging, and production rollout workflows. A structured patch lifecycle minimizes both vulnerability exposure and change-related outages.

Chapter 8See details

High Availability and Disaster Recovery

  • Lesson 1 • High Availability Architecture Principles

    Defines availability tiers, single points of failure, and redundancy patterns for infrastructure. HA design principles guide every architectural decision in this chapter.

  • Lesson 2 • Failover Testing and Runbook Execution

    Covers planned failover procedures, chaos testing principles, and runbook validation. Regular failover drills expose gaps before real incidents occur.

  • Lesson 3 • Load Balancing and Service Redundancy

    Covers Layer 4 and Layer 7 load balancing, health checks, and session persistence. Students configure HAProxy or Nginx to distribute traffic across redundant backends.

  • Lesson 4 • Database and Storage Replication

    Explains synchronous and asynchronous replication for databases and block storage. Replication strategy directly determines achievable recovery point objectives.

  • Lesson 5 • Disaster Recovery Planning and Testing

    Defines RTO and RPO targets, DR site strategies, and tabletop exercise methodology. Students produce a DR plan and execute a simulated recovery against defined objectives.

Certification

Your valid completion certificate

This course is for you:

  • Help desk technicians ready to move into server administration roles.

  • Junior IT staff managing small office networks without formal training.

  • Computer science graduates lacking practical infrastructure operations experience.

  • Career changers from non-technical fields pursuing stable IT operations jobs.

  • Developers frustrated by infrastructure gaps slowing down their deployment work.

  • Hobbyist homelab enthusiasts wanting to validate skills against professional standards.

What our students say

Your classes are perfect. I purchased the one-year package and finally have the opportunity to follow various topics of my interest without needing to change platforms... I thank you for everything you do, I've already recommended you to other people...
Giulio Carlo
Giulio CarloDigital Marketing Student
I like how the lessons are straight to the point and how I can switch chapters and skip content I don't need.
Mariana Ferres
Mariana FerresPhotography Student
I like the content and the way videos are presented and transcribed, which speeds up the process!
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Luciana AlvarengaNail Design Student
The platform is fast, simple to use. The diversity of content and complementary videos really help with learning.
André Felipe
André FelipePrompt Engineering Student

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