Free resources
Linux and DevOps
A whole Ubuntu machine to administer, then containers, web servers, monitoring and configuration as code.
Hands-on labs
Labs
Every lab is a real environment with a terminal beside it, nothing to install. Each has a short basic lesson that shows how a lesson works with a lab. A free account runs every lab and is given the basic lessons on Home; with no account you can run the Git lab and the SQL lab.
Ubuntu VM lab
Linux administration lab: users, permissions, cron and systemd in your browser
A Linux administration lab: users and groups, a shared folder, a cron job and a systemd service on a private Ubuntu VM, marked by a script. Free sample.
Free lessons
- Linux Administration Basics
How it works · Source on GitHub · Sign up free for the lesson
Container lab
Docker basics lab: learn containers, logs and restarts by fixing a broken service
Three containers in each student’s private lab copy, one broken on purpose: read its log, fix it and restart it with docker. Nothing to install; code on GitHub.
Free lessons
- Docker Basics
How it works · Source on GitHub · Create a free account to run it
Container lab
Web server hardening lab: fix a weak nginx configuration and check it with curl
Fix a deliberately weak nginx server in each student’s private lab copy: headers, folder listing, hidden files. Nothing to install; source on GitHub.
Free lessons
- Web Server Hardening Basics
How it works · Source on GitHub · Create a free account to run it
Container lab
Observability lab: Prometheus and Grafana, with an alerting rule for the student to write
Each student gets a private Prometheus and Grafana watching a web server: ask in PromQL, draw a panel, write an alert and make it fire. Source on GitHub.
Free lessons
- Observability Basics
How it works · Source on GitHub · Create a free account to run it
Ubuntu VM lab
Ansible lab: configure a machine with a playbook, in your browser
An Ansible lab: finish a playbook that installs a package, fills a template and writes a unit file, then run it twice. A private Ubuntu VM, marked by a script.
Free lessons
- Ansible Basics
How it works · Source on GitHub · Sign up free for the lesson
Basic lessons are given to every free account, on Home, and to every college. Curriculum lessons, such as T Level, are for colleges. Labs marked as an Ubuntu VM lab are set by a teacher in a module, and their lessons start the VM for you.
Run these yourself
A free personal account runs every lab here and its lesson. Teaching a class? Start a college and set them for your students.
Make a free accountStart a college
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