JeebByte

Zer0Trace

About this app

Learn Linux and the command line — right on your phone, in short lessons you'll actually finish.

No computer. No setup. No boring lectures. You type real commands, you see what they do, and you
move on. Each lesson takes about 3 minutes.

WHY JEEBBYTE IS DIFFERENT

• You DO, you don't read. Almost every screen is a task — type a command, predict the output,
build it from tiles, match it to its meaning. No walls of text.
• Every question teaches. Get it wrong and it explains why, in plain words, without making you
feel stupid.
• Roman English or English. Learn in the language you actually think in — switch any time in
Settings. (Roman English = Hindi/Urdu written in English letters.)
• Made for total beginners. If you have never opened a terminal in your life, you are exactly who
this is built for. We assume you know nothing.
• The course needs no account. Your lessons, XP and streak stay on your phone. Only the
optional Earn tab asks you to sign in.

EARN YOUR PREMIUM ACCESS (OPTIONAL)

Don't want to pay for premium lessons? You don't have to. Answer short surveys from independent
research panels inside the app, earn JB Points, and spend them on premium content and shop items.

• Completely optional. The whole course works without ever opening it.
• You sign in with Google, and you must be 18 or over — the research panels require it.
• JB Points are an in-app item. They are not money and cannot be withdrawn or cashed out.

WHAT YOU'LL LEARN (Termux Mastery — 10 modules, 62 lessons)

1. Get Termux running on your phone
2. Find your way around — pwd, ls, cd
3. Files and folders — mkdir, touch, cp, mv, rm
4. Read files — cat, less, head, tail
5. Get help when you're stuck — man, --help
6. Write files — nano
7. Install and run programs — pkg
8. Reach the internet from the terminal — curl, wget
9. Join commands together — pipes, grep, redirects
10. Write your first script — and run it

By the end you will have written a small program on your phone and run it yourself.

HOW IT WORKS

You practise inside the app first — nothing to install, nothing to break. The course also walks you
through installing Termux (the free terminal app) step by step with real screenshots, so when you're
ready you can run the same commands for real.

WHO IT'S FOR

• Total beginners who want to understand Linux and the command line
• Students starting out in IT, development, or cybersecurity — the terminal is the foundation
everything else is built on
• Anyone who has a phone and 3 minutes a day

MORE COMING

Termux Mastery is the first course. Networking is next. We'd rather ship one course that's actually
good than ten that aren't.

Free. No ads. No account. Just you and the terminal.

What’s new

fix some bugs