Understand the host. Protect the workloads. Verify the service.
Build a practical systems-administration foundation across server hardware, RAID, hypervisors, safe maintenance and recoverable backups, then work connected technician investigations.
You can open any step at any time. Mark activities complete when you're satisfied you've learned or practiced them—there are no locked lessons.
Identify failure domains and map hardware, storage, controllers, arrays and services; work a degraded RAID incident.
Build sample RAID 0/1/5/6/10 arrays and compare usable capacity, redundancy and common failure limits.
Connect hosts, VMs, datastores and virtual networking. Understand checkpoints, snapshots, performance pressure and evacuation.
Prepare approved change windows, capture baselines, check Linux services and define meaningful rollback and validation.
Investigate degraded RAID, aged virtual snapshots and an unready host-patching window through three-stage technician cases.
Learn recovery objectives, backup chains, immutability and the distinction between successful jobs and tested restores.
Use the existing original backup flashcards, questions and recovery investigation cases.
Investigate a near-full immutable backup repository and validate a safe recoverable result in the existing Lab.
Use the real-world Troubleshooter's structured evidence gathering, command references and ticket notes.
Revisit any resource as often as you need. Completion is a personal reminder, not an exam score or verified certificate.
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