cmdline comm cwd environ exe fd io limits maps mem mounts stat status task
Linux Labs
The learning and development labs for new hires and interns. Learn how Linux works by poking at it: each lab is a machine you type into, with a guide that shows what happened 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.