Linux Journey

   

[!NOTE] Linux Journey has joined the LabEx and is now actively maintained by the LabEx team while remaining free and open source.

We will continue building more structured Linux learning content and hands-on labs for beginners.

Official website: https://labex.io/linuxjourney (formerly https://linuxjourney.com)

Linux Journey - Learn Linux fundamentals through interactive lessons.

A structured learning path from beginner to advanced Linux administration with three levels:

• Grasshopper - Learn the basics
• Journeyman - System internals
• Networking Nomad - Network administration

Grasshopper

Getting Started

What is Linux? Get started with choosing a distribution and installation.

• Linux History
• Choosing a Linux Distribution
• Debian
• Red Hat Enterprise Linux
• Ubuntu
• Fedora
• Linux Mint
• Gentoo
• Arch Linux
• openSUSE
• Best Linux for Cybersecurity

Command Line

Learn the fundamentals of the command line, navigating files, directories, and more.

• The Shell
• pwd (Print Working Directory)
• cd (Change Directory)
• ls (List Directories)
• touch
• file
• cat
• less
• history
• cp (Copy)
• mv (Move)
• mkdir (Make Directory)
• rm (Remove)
• find
• help
• man
• whatis
• alias
• exit

Text-Fu

Learn basic text manipulation and navigation.

• stdout (Standard Out)
• stdin (Standard In)
• stderr (Standard Error)
• pipe and tee
• env (Environment)
• cut
• paste
• head
• tail
• expand and unexpand
• join and split
• sort
• tr (Translate)
• uniq (Unique)
• wc and nl
• grep

Advanced Text-Fu

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

• regex (Regular Expressions)
• Text Editors
• Vim (Vi Improved)
• Vim Search Patterns
• Vim Navigation
• Vim Inserting and Appending Text
• Vim Editing
• Vim Saving and Exiting
• Emacs
• Emacs Manipulate Files
• Emacs Buffer Navigation
• Emacs Editing
• Emacs Exiting and Help

User Management

Learn about user roles and management.

• Users and Groups
• root
• /etc/passwd
• /etc/shadow
• /etc/group
• User Management Tools

Permissions

Learn about permission levels and modifying permissions.

• File Permissions
• Modifying Permissions
• Ownership Permissions
• Umask
• Setuid
• Setgid
• Process Permissions
• The Sticky Bit

Processes

Learn about the running processes on the system.

• ps (Processes)
• Controlling Terminal
• Process Details
• Process Creation
• Process Termination
• Signals
• kill (Terminate)
• niceness
• Process States
• /proc filesystem
• Job Control

Packages

Learn all about the dpkg, apt-get, rpm, and yum package management tools.

• Software Distribution
• Package Repositories
• tar and gzip
• Package Dependencies
• rpm and dpkg
• yum and apt
• Compile Source Code

Journeyman

Devices

Learn about Linux devices and how they interact with the kernel and user space.

• /dev directory
• device types
• Device Names
• sysfs
• udev
• lsusb, lspci, lsscsi
• dd

The Filesystem

Learn about the Linux filesystem, the different types of filesystems, partitioning, and more.

• Filesystem Hierarchy
• Filesystem Types
• Anatomy of a Disk
• Disk Partitioning
• Creating Filesystems
• mount and umount
• /etc/fstab
• swap
• Disk Usage
• Filesystem Repair
• Inodes
• symlinks

Boot the System

Learn about the stages of the Linux boot process.

• Boot Process Overview
• Boot Process: BIOS
• Boot Process: Bootloader
• Boot Process: Kernel
• Boot Process: Init

Kernel

The most important part of the Linux system; learn about how it works and how to configure it.

• Overview of the Kernel
• Privilege Levels
• System Calls
• Kernel Installation
• Kernel Location
• Kernel Modules

Init

Learn about the different init systems: SysV, Upstart, and systemd.

• System V Overview
• System V Service
• Upstart Overview
• Upstart Jobs
• Systemd Overview
• Systemd Goals
• Power States

Process Utilization

Learn resource monitoring with top, load averages, iostat, and more!

• Tracking processes: top
• lsof and fuser
• Process Threads
• CPU Monitoring
• I/O Monitoring
• Memory Monitoring
• Continuous Monitoring
• Cron Jobs

Logging

Learn about system logs and the /var/log directory.

• System Logging
• syslog
• General Logging
• Kernel Logging
• Authentication Logging
• Managing Log Files

Networking Nomad

Network Sharing

Learn about network sharing with rsync, scp, nfs, and more.

• File Sharing Overview
• rsync
• Simple HTTP Server
• NFS
• Samba

Network Basics

Learn about networking basics and the TCP/IP model.

• Network Basics
• OSI Model
• TCP/IP Model
• Network Addressing
• Application Layer
• Transport Layer
• Network Layer
• Link Layer
• DHCP Overview

Subnetting

Learn about subnets and how to do subnet arithmetic!

• IPv4
• Subnets
• Subnet Math
• Subnetting Cheats
• CIDR
• NAT
• IPv6

Routing

Learn how packets are routed across networks!

• What is a router?
• Routing Table
• Path of a Packet
• Routing Protocols
• Distance Vector Protocols
• Link State Protocols
• Border Gateway Protocol

Network Config

Learn about network configuration using Linux tools!

• Network Interfaces
• route
• dhclient
• Network Manager
• arp

Troubleshooting

Learn about common networking tools to help you diagnose and troubleshoot issues!

• ICMP
• ping
• traceroute
• netstat
• Packet Analysis

DNS

Everything and more that you wanted to know about DNS.

• What is DNS?
• DNS Components
• DNS Process
• /etc/hosts
• DNS Setup
• DNS Tools

Contributing

We welcome contributions! See CONTRIBUTING.md for detailed guidelines on:

• Adding new lessons and content
• Translation guidelines
• Lesson templates and structure
• Development workflow

License and Usage

Linux Journey content is licensed under CC BY-SA 4.0 and maintained by the LabEx team.

You may study, share, translate, and adapt the lesson content under the terms of the CC BY-SA 4.0 license, including proper attribution and share-alike licensing for adapted content.

This license does not grant permission to use the Linux Journey name, branding, visual identity, course organization, or substantial content collection to create a confusingly similar website, product, or service that imitates Linux Journey or is intended to replace the official Linux Journey experience.

Public reuse of substantial Linux Journey content should be clearly presented as independent from Linux Journey, should link back to the official website at https://labex.io/linuxjourney (formerly https://linuxjourney.com), and must not mislead users into believing it is the official Linux Journey site or an official substitute for it.