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Linux Labs
Learn how Linux works by poking at it. Each lab is a machine you type into, with a diagram that shows what the kernel did and why.
Course, chapter 1: your first day as the admin
You've inherited Brightfield Studio's server. Tickets from the team walk you through the job: which machine this is, root and sudo, the manual, units, installing with apt, a risky vendor script, building from source, and a small incident.
13 steps 01What is /proc?
Part 1, reading. Starts from zero: what a process is, what the kernel is, what /proc is, and what the io file counts. Six short pages.
6 pages 01Do it on Ubuntu: how /proc/self/io counts
Part 2, hands on. The Ubuntu desktop opens with the Lab Guide beside it. Do each task in the Terminal, Files and System Monitor; it ticks off and explains your own numbers.
9 steps ▣Ubuntu desktop
The same simulated Ubuntu 24.04, to practise on freely. Your files, windows and progress are saved, so a refresh changes nothing.
openYour machine and progress are saved for this browser, so a refresh changes nothing. Have a real Ubuntu? The same lab with pictures from real Ubuntu.