terminal

Linux Fundamentals

From zero to Linux hero

The flagship course of Terminal 43. Takes a complete beginner from "what is Linux?" to confidently navigating the filesystem, managing processes, analyzing network traffic, and writing shell scripts -- all through hands-on challenges inside real Docker containers.

Beginner 72 challenges 15950 points ~55 hours

Course Content

0. Welcome to Linux

4 lessons

Introduction to the Linux operating system, the shell, and your very first commands.

What is Linux? 20min

The Shell -- Your New Home 20min

Getting Help -- man, --help, info 20min

Your Very First Commands 25min

1. Navigating the Filesystem

5 lessons

Learn the Linux directory tree, moving around with cd/ls/pwd, and creating, copying, moving, and deleting files.

The Linux Directory Tree 20min

Moving Around -- cd, ls, pwd 20min

Creating and Destroying -- mkdir, touch, rm, rmdir 20min

Copying and Moving -- cp, mv 20min

Finding Files -- find and locate 25min

2. Reading and Writing Files

9 lessons

Master file viewing, searching with grep, and text processing with sort, uniq, wc, cut, and tr.

Viewing Files -- cat, less, more, head, tail 20min

Searching -- grep 25min

Text Processing -- sort, uniq, wc, cut, tr 25min

Editing Files -- nano basics 20min

Comparing Files -- diff and comm 20min

File Challenge: Fix the SSH Config 20min

File Challenge: Parse the Access Log 15min

File Challenge: Fix the SSH Config 20min

File Challenge: Parse the Access Log 15min