Linux System Administration
Everything runs on Linux. Learn to configure it, secure it, automate it — and to be the person who can still fix it when the dashboard is red and nobody knows why. The foundation course of the DevOps track, reachable with no programming background at all.
This is the foundation course of the whole DevOps, Cloud & Security track — the layer underneath Docker, Kubernetes, Terraform, CI/CD and security work. Every container runs on a Linux kernel, every cloud instance is a Linux box, every pipeline executes on a Linux runner, and every production incident eventually ends at a shell prompt. Those other disciplines assume this knowledge and none of them teach it. This course teaches it — from first principles, with no programming background required — and it is built around the one thing free tutorials never cover: diagnosis under pressure.
Is "System Administrator" Still a Career? An Honest Answer
A fair question, and the honest answer sells better than avoiding it: the job title is fading; the skill is now compulsory. DevOps, SRE, cloud, platform and security roles all assume Linux administration, which means the skill appears in far more job descriptions than the title does. People who skip these fundamentals hit a ceiling fast — they can follow a runbook, but they cannot diagnose anything the runbook doesn't already cover. That gap is exactly what stalls careers, and it is exactly what this course is designed to close.
We are also honest about the commodity part. Free Linux tutorials are everywhere and they teach commands — you can memorise a hundred of them and still freeze when a service won't start and the logs don't say why. What they don't teach is method: how to reason from symptom to cause under time pressure, on a system you didn't build, while something is down. Troubleshooting is the spine of this page and of the course, not an appendix. You will deliberately break systems and recover them, over and over, until a red dashboard makes you curious instead of anxious.
Working With AI on a Production System — Without Breaking It
Enterprise Linux now ships with an AI assistant that suggests packages, configurations and troubleshooting steps in plain language. Used well, it is a genuine accelerator. Used carelessly, it is a fast way to break production as root. The discipline we teach is simple and we teach it explicitly: a suggestion is a hypothesis, not an answer. You verify it against the manual pages, the package database and the system's actual state before you run it — and you understand what it does before you trust it. There is a short, practical block on working effectively with AI tooling without letting it make changes you can't explain. And a grounding point: the leading certification exams are performance-based with no external assistance, so the underlying knowledge is not optional — the AI cannot sit the exam or carry the 2 a.m. incident for you.
Course at a Glance
- Duration: 10 weeks | ~70 hours | live + hands-on
- Format: Live online · lab-heavy · you will break systems deliberately and recover them
- Prerequisite: General computer literacy. No programming, scripting or Linux experience required — everything is taught from first principles. This is the widest entry point in the section.
- Curriculum: 10 modules, from the shell to a full break-fix and hardening capstone
- Certification: Aligned to the leading vendor-specific enterprise Linux administrator credential and to the main vendor-neutral alternatives
- Curriculum reviewed: July 2026 — the enterprise distributions and their certification framework changed recently; this syllabus is checked against vendor documentation
Course Highlights
- Every module leads with what you configure, diagnose or recover — not what you "learn about"
- Troubleshooting as the spine — a systematic diagnostic method you apply from Module 4 onward
- No programming background needed — the widest entry point into the entire DevOps track
- systemd treated as the centre of the system — services, targets, timers, cgroups and the journal, where real troubleshooting starts
- Mandatory access control taught as something to debug, not disable — the field's most common bad habit, corrected
- Image mode — the operating system built and shipped as a bootable container image, with atomic updates and rollback; barely taught anywhere else
- Configuration as code with Ansible — administer many machines without logging into any of them
- A timed break-fix gauntlet and a capstone that takes an unmanaged environment to hardened, automated and documented
Where This Course Sits in the Track
This course is deliberately scoped so it doesn't step on its siblings — it sits underneath them:
- Docker & Kubernetes owns container orchestration. Here you learn container fundamentals on the host — the runtime, rootless and daemonless operation, and the container tooling that ships with enterprise Linux — and stop there. See our Docker & Kubernetes course for orchestration.
- Cybersecurity owns the security discipline. Here you learn host hardening — mandatory access control, firewalling, auditing, patching — as system administration. See our Cybersecurity and Ethical Hacking & Penetration Testing courses for the security track.
- Terraform owns provisioning the machine; this course owns what the provisioned machine actually does once it exists. See our Terraform & Infrastructure as Code and CI/CD with Jenkins & GitHub Actions courses for the delivery layer.
Hands-on Projects & Portfolio
From installation to a hardened, monitored baseline across several machines.
Extend a filesystem under a running service, then recover a host that won't boot after a bad mount.
Write custom units and timers, then diagnose and repair a set of broken services with no hints.
Core services with firewalling, TLS and access control.
Before/after evidence and a written justification for every exception.
Debug real mandatory-access-control denials and write correct policy — rather than turning it off.
Convert a manual server build into a repeatable, idempotent playbook.
Build a bootable OS image with container tooling, deploy it, update it atomically and roll it back.
Timed scenarios — a full disk, a DNS failure, a permissions problem, a runaway process, a failed boot.
An unmanaged environment taken to hardened, automated, documented and defensible.
Tools & Stack
Linux (RHEL-family) Linux (Debian-family) Bash systemd SSH LVM SELinux firewalld nftables DNF / APT Podman bootc image mode Ansible cron & systemd timers rsync Git Vim tcpdump Wireshark Prometheus Grafana journald auditd KVM Docker
Certification Alignment
- Mapped to the leading vendor-specific enterprise Linux administrator certification and to the main vendor-neutral alternatives (such as the Linux Professional Institute certifications and CompTIA Linux+)
- Note: the vendor's certification framework was restructured in 2026 into specialisation tracks and progressive levels — an optional entry-level tier, a baseline administrator credential, and engineer and architect levels within each track. Much of the older path advice online is now out of date; we align to the current structure, not the retired ladder
- The leading exam is fully performance-based — you fix real systems under time pressure rather than answer questions, which is exactly why this course is built around labs
- Presented as preparation and alignment only — no official partnership or accreditation implied, and no exam outcome guaranteed
Career Outcomes
Linux administration is less a destination than a prerequisite: it is the substrate under containers, cloud, automation and security work, which is why the skill appears in far more job descriptions than the job title does. It also remains one of the most accessible technical entry points for people without a programming background — particularly those coming from support, networking and operations — and the enterprise distributions are dominant in banking, telecom, government and large services organisations. This course targets:
- Linux System Administrator
- DevOps Engineer
- Site Reliability Engineer
- Cloud Engineer
- Platform Engineer
- Infrastructure Engineer
- Support & NOC Engineer
- Security Engineer
- Database or Application Administrator on Linux platforms
Who This Course Is For
- Final-year students and fresh graduates from any background who want a technical entry point that does not require programming — this is one of the most accessible routes into infrastructure work
- IT support, helpdesk and desktop professionals moving into infrastructure
- Windows administrators adding Linux
- Developers who deploy to Linux but can't debug it — a very common and quietly limiting gap
- Aspiring DevOps, cloud and SRE engineers who skipped the fundamentals and hit a ceiling
- Security professionals who need real host-level depth
- Network engineers expanding into systems
- Anyone preparing for a performance-based Linux certification
Material Includes
- Class recordings
- Multi-server lab environment & deliberately broken practice systems
- Troubleshooting playbooks, hardening checklists & command references
- Certificate
Prerequisites
- General computer literacy
- No programming, scripting or Linux experience required
- Everything is taught from first principles
Estimated Time: 7 Hours
You configure:- Your own virtualised lab, and enough shell fluency that the command line stops being an obstacle and becomes the fastest way to get anything done
- Distribution families and which one you'll actually meet at work; installation and virtualisation for your lab; the filesystem hierarchy
- Navigating and manipulating files; the shell environment; redirection and pipes; text processing with the classic tools; regular expressions; editors
- Getting fluent enough that the command line stops being an obstacle
Estimated Time: 6 Hours
You configure:- Accounts, groups and least-privilege access on a real system — including key-based SSH that you've hardened yourself
- Accounts, groups and the password and shadow files; standard and special permissions; access control lists
- Privilege escalation with sudo and sane sudoers policy; SSH key-based authentication and hardening; session management
- The principle of least privilege applied to real systems
Estimated Time: 6 Hours
You configure:- Repositories, a patch strategy and a clean rollback path — so software changes are deliberate and reversible, not hopeful
- Repositories and package managers; dependency resolution; modules and application streams
- Sandboxed application packaging; building and installing from source when you must
- Patch management strategy; rollback
Estimated Time: 8 Hours
You diagnose:- A failed service — methodically, from the journal to the unit file to the root cause — instead of guessing. This is where the course's troubleshooting spine begins
- Units, services, targets, timers, mounts and user units; writing unit files from scratch; dependencies and ordering
- Resource control with control groups; the boot process end to end; changing the default target
- The journal and log management; diagnosing a failed service methodically rather than by guesswork
Estimated Time: 7 Hours
You recover:- A system that will not boot because of a storage change — after learning to resize volumes safely under a running service
- Partitioning; filesystems and their trade-offs; mounting and persistent mount configuration; logical volume management including resizing
- Swap; RAID concepts; quotas; network and automounted filesystems; encrypted volumes; snapshots
- Recovering a system that will not boot because of a storage change
Estimated Time: 7 Hours
You diagnose:- A network failure end to end — because it is always DNS, until you can prove it isn't — and stand up the common services behind a firewall
- Addressing and routing; modern network configuration tooling; DNS resolution and why it is always DNS
- SSH in depth including tunnelling; firewalling with the current framework and the newer packet filtering layer
- Network troubleshooting methodology; common services such as web, file and time servers
Estimated Time: 8 Hours
You harden:- A host to a published benchmark with evidence for every control — and you debug a mandatory-access-control denial instead of disabling enforcement, the field's most common bad habit
- Mandatory access control: understanding contexts, booleans and how to debug a denial instead of disabling enforcement; auditing and file integrity monitoring
- Host hardening baselines and benchmarks; intrusion detection basics; certificate and cryptography management including post-quantum-ready algorithms
- Compliance profiles; a documented hardening exercise
Estimated Time: 8 Hours
You automate:- A manual server build into a repeatable, idempotent playbook — and manage a fleet without logging into any single machine
- Shell scripting properly: variables, conditionals, loops, functions, argument handling, error handling and exit codes; scheduled work with timers
- Ansible for declarative configuration — inventories, playbooks, roles, idempotency, vendor-supplied system roles
- Managing many machines without logging into any of them
Estimated Time: 7 Hours
You build:- A bootable, immutable operating system as a container image — deploy it, update it atomically and roll it back — the convergence point between traditional administration and container practice
- Containers on the host; rootless and daemonless operation; images and registries; running containers as managed services
- Image mode: building and deploying a bootable immutable operating system using container tooling, with atomic updates and rollback
- When a traditionally package-managed host is still the right answer
Estimated Time: 8 Hours
You deliver:- A deliberately misconfigured environment made correct, hardened, automated and documented — after proving you can diagnose a saturated system and recover an unbootable one under time pressure
- The systematic diagnostic method; CPU, memory, I/O and network analysis; identifying resource saturation; tracing and observability tools; log correlation
- Kernel parameters and tuning; backup and restore strategy; disaster recovery; rescue and single-user boot; root password recovery; documenting an incident
- Capstone: take a deliberately misconfigured environment and make it correct, hardened, automated and documented
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