The GNU Operating System is a free software movement that provides users with the freedom to run, copy, distribute, study, change and improve software.

Nonprofit promoting computer user freedom by defending rights to run, edit, share, and contribute to software.

Fiat Tux is a personal blog focused on Debian, GNU/Linux, system administration tips, and self-developed geek tools like Bignole for SSH configuration management.

The Debian Administrator's Handbook is a free book teaching essential skills for becoming an effective and independent Debian GNU/Linux administrator.

Blog and Web is a blogging and web development resource for beginners and experienced users.

UbuntuPIT is a technology blog providing the latest GNU/Linux news, software reviews, tutorials, and command guides for Linux enthusiasts.

Ivon's Blog shares in-depth guides on GNU/Linux, FOSS, computer/mobile tech, and philosophical discussions, focusing on practical application.

Gallery of GNU/Linux, BSD, and other open-source distributions and open source desktop environments with updates & stories on each.

TurnKey GNU/Linux is the best solution for server apps and is used by developers and businesses for easy cloud deployment.

SeaGL is the best conference for GNU/Linux enthusiasts and is used by technologists, newcomers, and free software advocates.

Trisquel GNU/Linux is the best free operating system for home users and educational centers, used by those seeking open-source solutions.