Linux

86+ commands and 8 tutorials covering the Linux command line, system administration, and shell scripting.

Master the command line. From basic file operations to advanced system administration, this section covers everything you need to become proficient with Linux.

86+

Commands

Tutorials

Quick Start

Command Reference

Browse 86+ commands with syntax, options, and examples.

Start Learning

Begin with file permissions - fundamental to Linux security.

Browse by Category

File System Navigation File Management File System Directory Management Create File Content Utilities Searching View All

Popular Commands

ls

List directory contents

cd

Change directory

pwd

Print working directory name

cp

Copy files and directories

mv

Move or rename files and directories

mkdir

Make directories

rm

Remove files or directories

rmdir

Remove empty directories

touch

Change file timestamps or create empty files

cat

Concatenate and display file content

grep

Print lines matching a pattern

find

Search for files in a directory hierarchy

View all 86 commands

Getting Started

Linux File Permissions Deep Dive

beginner

Master the Unix permission system with chmod, chown, and access control lists.

20 min Updated 2024-12-18

User and Group Management

beginner

Create, modify, and manage users and groups on Linux systems.

25 min Updated 2024-12-18

System Administration

Process Management Essentials

intermediate

Control, monitor, and troubleshoot Linux processes effectively.

30 min Updated 2024-12-18

Cron Jobs and Task Scheduling

intermediate

Automate tasks with cron, systemd timers, and at commands.

20 min Updated 2024-12-18

Package Management Across Distros

beginner

Install, update, and manage software with apt, dnf, pacman, and more.

20 min Updated 2024-12-18

Systemd Service Management

intermediate

Control system services with systemctl, create custom services, and understand systemd.

25 min Updated 2024-12-18

Shell Scripting

Shell Scripting Fundamentals

beginner

Write robust Bash scripts with proper error handling, variables, and control flow.

45 min Updated 2024-12-18

Security

SSH Security Best Practices

intermediate

Secure your SSH server and client configuration. Key-based auth, hardening, and tunnels.

30 min Updated 2024-12-18

Why Learn Linux?

Servers - Powers 90%+ of web infrastructure
DevOps - Essential for CI/CD and automation
Cloud - AWS, GCP, Azure all run Linux

Security - Most security tools are Linux-first
Containers - Docker and Kubernetes foundation
Open Source - Free, customizable, community-driven