Master the terminal
with challenges
that count
A terminal inside the app, short Linux and Git missions, and a bear named Bob who keeps breaking the server. You type, you fix it, and you earn XP.
Free to start. For now, Android only.
nginx fell at 3 a.m. Now what?
That is how a Bob challenge starts. And how it ends.
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I took nginx down. Let's see you bring it back.Bob makes a mess
Customers are seeing an error and the site will not open. The ticket is yours.
$ curl -I localhost Connection refused -
You fix it in the terminal
Check the status, find what Bob did, and type the fix. Stuck? The penguin has a hint.
$ sudo systemctl start nginx -
+120 XP+50 coinsSite is up
XP, coins, and one more day on your streak. Bob will try again tomorrow.
✓ Mission complete
From your first ls to production on-call
Never opened a terminal? Start from zero. Already use it at work? Jump to the challenges.
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Getting started
lscdpwd -
Dev and infra
chmodpsgit -
DevOps e SRE
systemctljournalctl
A penguin on your side. A bear on the other.
Bob is Comandu's villain. He deletes a file, opens a permission too far, and takes a service down. Every mess he makes becomes a challenge for you.
And the penguin? He is on your side. He celebrates each win and shows up with a hint when you get stuck.
Common questions
Did not find yours? Write to contato@comandu.com.br and we will reply.
Is Comandu free?
Yes. You download it, create an account, and play the tracks without paying. Comandu Pro is optional: it removes ads and unlocks premium tracks, every premium challenge, an exclusive boss, and the new premium content as it arrives.
Do I need to know Linux to start?
No. The track starts from zero, with ls, cd, and pwd, and each step explains what the command does. If you get stuck, the penguin has a hint.
Do the commands really run on my phone?
No. The app has a simulated terminal that answers like a real Linux, without touching your phone. Miss as much as you want: nothing breaks.
Is there Git too?
Yes. Besides Linux, there is a Git track in the terminal: commit, branch, merge, stash, push, and how to resolve conflicts.
Does it work on iPhone?
For now Comandu is available only on Android, on Google Play.
Latest from the blog
The command, what the terminal answers, and when to use it.
$ comandu --next-mission
Bob already took nginx down. Are you leaving it like that?
Download Comandu and finish the first mission today.
