Beginner

Learn the basics.

Getting Started

What is Linux? Choose a distribution and get installed.

Command Line

Learn the fundamentals of the command line — navigating files and directories.

Text-Fu

Basic text manipulation and navigation.

Advanced Text-Fu

Navigate text like a Linux spider monkey with Vim and Emacs.

User Management

Manage users, groups, and identities on a Linux system.

Permissions

Read, write, execute — the Linux permission model.

Processes

What processes are and how to manage them.

Packages

Install and manage software with package managers.

Beduin

System internals.

Devices

How Linux talks to hardware.

The Filesystem

Filesystem hierarchy, mounting, and disk layout.

Boot the System

What happens between power-on and a login prompt.

Kernel

The heart of Linux: kernel, modules, and system calls.

Init

systemd, SysV init, and how services come up.

Process Utilization

Watching what processes consume — CPU, memory, IO.

Logging

syslog, journalctl, and where logs hide.

Networking Imam

Network administration.

Network Sharing

Sharing files and printers across a network.

Network Basics

IP, TCP, packets — the model under the wire.

Subnetting

Carving up IP space with subnets and CIDR.

Routing

How packets find their way between networks.

Network Config

Configuring interfaces, addresses, and DNS resolvers.

Troubleshooting

Tools and tactics for diagnosing network problems.

DNS

How names become addresses.