Linux

Getting Started

Filesystem Basics

Understanding how Linux organises files and how to navigate around.

Files & Directories

Create, copy, move, and delete files. Master wildcards and symlinks.

Viewing & Editing

Read file contents, diff files, and edit text with nano or Vim.

Finding Files & Text

Find files by name or content. Use grep and regex to search inside files.

Users & Permissions

Linux permission model, user management, sudo, ACLs, and special modes.

I/O Redirection & Pipes

stdin/stdout/stderr, redirect output to files, and chain commands with pipes.

Text Processing

Transform and extract data from text streams with the classic Unix tools.

Processes

Understand, monitor, and control what's running on your system.

Automation & Shell Features

Command sequencing, aliases, command history, and cron for scheduled tasks.

Variables & Environment

Shell variables, environment variables, config files, and the PATH.

Archiving & Compression

Bundle and compress files with tar, gzip, bzip2, xz, and zip.

Networking

Diagnose connections, transfer files, SSH into remotes, and manage the firewall.

Package Management

Install, update, and remove software with apt, dnf, pacman, snap, and flatpak.

Disk Management

Check usage, mount drives, partition disks, and manage swap space.

System Administration

Monitor resources, manage services with systemd, read logs, and understand boot.

Security

SSH keys, GPG encryption, and hardening your Linux system against attacks.