Linux Basics

Learn Linux fundamentals with a clean cheat sheet and a safe interactive practice terminal.

Command Cheat Sheet

Focused on beginner essentials, with a few intermediate and advanced references.

Level	Command	What it does	Example
Beginner	pwd	Print current working directory	pwd
	ls	List files and folders	ls
	cd <dir>	Change directory	cd projects
	cd ..	Go up one directory	cd ..
	mkdir <name>	Create a new folder	mkdir lab-notes
	touch <file>	Create an empty file	touch todo.txt
	cat <file>	View file contents	cat notes
	echo <text>	Print text output	echo Hello Linux
	clear	Clear terminal output	clear
	help	Show supported practice commands	help
Intermediate	tree	Show directory structure	tree
	whoami	Show active username	whoami
	uname	Show kernel/system info	uname
	ls /etc	List another path	ls /etc
	cd /home/student	Use absolute paths	cd /home/student
Advanced	cat /etc/hosts	Read a system file	cat /etc/hosts
	mkdir practice && cd practice	Command chaining idea	(concept only in real shell)
	man <command>	Read manual pages (real Linux)	man ls

Interactive Practice Terminal

Linux Basics (practice mode)

Type 'help' to see commands.

student@linux-basics:/home/student$

Beginner quick-start: pwd · ls · cd <dir> · cd .. · mkdir <name>