Linux Labs
Where to start First steps track · 15 stages
Linux Labs
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Linux from scratch: a free Linux administration trainer

An open learning platform for those who are learning Linux administration from scratch and mean to reach a confident level. Learning is built on practice: theory comes with tasks on isolated virtual machines with full rights, quizzes let you check yourself, and the reference opens right from the workspace. Materials and machines are free of charge.

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Project author — Dim Sanych

Demo The site is down: nginx will not start
Demo: labs solved one after another. The output was recorded on the same kind of disposable machine you get.

Tracks

All tracks · 11
01 easy easy First steps 7 labs · ~6 hours · easy Linux and your first commandsTerminal workflowNavigation and paths 02 medium medium Users, permissions, and processes 6 labs · ~7 hours · medium Users and permissionsUser administration and sudoProcesses and signals 03 easy easy Packages, services, and logs 7 labs · ~8 hours · easy Packages and software installationSystemd servicesSchedules and logs 04 medium medium Networking 9 labs · ~9 hours · medium Addresses and routesPorts and firewallDNS and SSH 05 medium medium Storage 8 labs · ~7 hours · medium Disks and filesystemsA new diskLogical volumes 06 medium medium Bash: text processing and scripts 4 labs · ~5 hours · medium Searching and editing textScripts: arguments and conditionsReliable scripts 07 medium medium Inside the system: resources, kernel, processes 7 labs · ~7 hours · medium CPU, memory and OOMLimits and kernel parametersWhat a process is doing 08 medium medium Web stack 7 labs · ~6 hours · medium Nginx: sites and proxyTLS and certificatesPostgreSQL for administrators 09 medium medium Server security 7 labs · ~7 hours · medium What a server exposesLogins and passwordsConfinement and audit 10 medium medium Containers: Docker and compose 5 labs · ~6 hours · medium A container from the insideImages and dataSeveral containers 11 medium medium Automation: Git and Ansible 3 labs · ~5 hours · medium Git for configurationAnsible: first playbooksRoles

Interactive tasks

Every lab is its own virtual machine, a situation and a set of goals. A script checks the result on the system itself, not the text of the commands you typed.

Lab · Packages, services, and logs easy ~15 min

Fix nginx

The nginx site stopped opening after yesterday's work. Find the cause and bring the site back.

Given: a clean Ubuntu 24.04 machine with sudo rights.

Lab goals

3 of 4 · example of a check
  • The nginx configuration passes nginx -t
  • The nginx service is active
  • http://localhost/ returns HTTP 200
  • The default site is still in place

Wiki

All 183 articles

The reference has 183 articles in 14 sections. It opens right from a lab.

Basic commands 31

Network 20

Processes 20

Tools

All tools · 14

14 utilities for everyday work: permissions, cron, subnets, JSON and YAML, passwords. They work right in the browser.
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