Unix/Linux CLI Commands

Your pocket reference for the Unix & Linux command line — browse commands by category, then practice them live in a safe, built-in terminal. Nothing touches your device.

Unix/Linux CLI Commands is a clean, fast reference for the Unix and Linux command line — and a safe place to practice what you learn.

Whether you're a student, a developer, or a system administrator brushing up, every command is explained in plain language with real examples you can try right away.

BROWSE BY CATEGORY Commands are grouped into clear categories — file management, searching, text processing, networking & communication, storage, system status and more — so you can find what you need fast or explore a topic from the ground up.

LEARN WHAT EACH COMMAND DOES Each entry gives you the command, its full name, a short description of what it does, and practical examples. No fluff, no wall of man-page text — just what you need to understand and use it.

PRACTICE IN A SAFE TERMINAL Reading is one thing; doing is another. The built-in terminal is a real, in-memory shell where you can actually run commands — ls, cd, pwd, mkdir, cat, echo, file, find and more — against a virtual filesystem stocked with sample files and folders. Nothing touches your real device, so you can experiment freely and break things without worry.

READABLE, YOUR WAY Pick the reading font and size that suit you, and choose Light, Dark, or System appearance. Designed to look right on both iPhone and iPad.

A handy companion for anyone learning the shell or keeping the essentials close at hand.