There is an abundance of Free/Libre Open Source Software (FLOSS) projects and related documentation. The following is a collection of links to resources that may help you utilize the breadth and depth of the FLOSS ecosystem.
- About the GNU Operating System
- Documentation regarding the history of GNU and how it fits into the FLOSS movement.
- Ansible Documentation
- An IT automation tool that can configure systems, deploy software, and orchestrate more advanced IT tasks.
- Bash Reference Manual
- The GNU reference manual for the Bash shell.
- BashGuide
- An introduction to basic and advanced concepts of the Bash shell.
- Buildah
- A tool that facilitates building Open Container Initiative (OCI) container images.
- Certbot Documentation
- An easy-to-use client that fetches a certificate from Let’s Encrypt and deploys it to a web server.
- CNCF Cloud Native Interactive Landscape
- Cloud Native Computing Foundation's recommended path through the cloud native landscape.
- Cockpit Documentation
- A web-based graphical interface for servers, intended for everyone.
- coreboot Documentation
- Developer documentation for coreboot, open source boot firmware for various architectures.
- DevDocs API Documentation
- Fast, offline, and free documentation browser for developers.
- Email Self-Defense
- Guide for learning about email self-defense with GnuPG.
- firewalld Documentation
- A dynamically managed firewall with support for network/firewall zones to assign a level of trust to a network and its associated connections, interfaces, or sources.
- Flathub
- An app store and build service for Linux.
- Flatpak Documentation
- Everything you need to know to build and distribute applications using Flatpak.
- Free Software Directory
- A collaborative catalog of free software.
- Git Documentation
- Documentation resources for the Git distributed version control system.
- Gitea Documentation
- A community managed lightweight code hosting solution.
- GNOME Development
- Get help developing applications for GNOME.
- GNOME Library - Administrators
- A guide for GNOME 3 system administrators.
- GNOME Library - Users
- A guide for GNOME 3 desktop users.
- GNU GRUB Manual
- Manual for the GRUB boot manager.
- GNU Manuals Online
- Official GNU packages with links to their primary documentation.
- Internet Relay Chat Help
- Guidance on IRC and how it works.
- JSON
- A lightweight data-interchange format.
- Kubernetes Documentation
- An open source container orchestration engine for automating deployment, scaling, and management of containerized applications.
- LibreOffice
- Documentation and guides for the LibreOffice productivity suite.
- libvirt
- Documentation for the libvirt virtualization API.
- Linux Containers
- The umbrella project behind LXD, LXC, LXCFS, and distrobuilder.
- Linux Foundation - Open Source Guides
- Best practices for running an open source program office or starting an open source project in your organization.
- Linux Foundation - Projects
- Projects hosted by the Linux Foundation.
- Linux Learning Paths
- Learning paths geared towards developers.
- Linux Professional Institute - Learning
- Free material for teachers and learners that supports you in preparing for LPI's Linux and open source certifications.
- Linux Tutorials
- Tutorials that provide step-by-step instructions that a developer can follow to complete a specific task or set of tasks.
- LWN.net Weekly Edition Archives
- Reader-supported news site dedicated to producing the best coverage from within the Linux and free software development communities.
- nftables Wiki
- Documentation on how to build, install, configure, and use nftables.
- Open Source Cloud Guide
- A guide to highlight important aspects of hybrid cloud and multicloud development, and their corresponding open source services.
- OSDev Wiki
- Information about the creation of operating systems and a community for those people interested in OS development.
- Packages Search
- A simple method for browsing, searching, and downloading the newest versions of Linux and Unix packages.
- Pandoc
- A Haskell library for converting from one markup format to another, and a command-line tool that uses this library.
- Philosophy of the GNU Project
- The ideas behind the concept of free software.
- Podman
- A daemonless, open source, Linux native tool designed to make it easy to find, run, build, share, and deploy applications using Open Containers Initiative (OCI) Containers and Container Images.
- reStructuredText
- An easy-to-read, what-you-see-is-what-you-get plaintext markup syntax and parser system.
- Shellcheck Error Guide
- Error code descriptions for the Shellcheck code linter.
- Sphinx Documentation
- A tool that makes it easy to create intelligent and beautiful documentation.
- systemd
- Documentation for the systemd initialization system.
- Tails Documentation
- A portable operating system that protects against surveillance and censorship.
- The Bash Hackers Wiki
- Human-readable documentation and information about GNU Bash.
- The Boot Loader Specification
- The set of file formats and naming conventions that allow the boot loader configuration to be shared between multiple operating systems and boot loaders installed on one device.
- The Filesystem Hierarchy Standard
- The set of requirements and guidelines for file and directory placement under UNIX-like operating systems.
- The GNU Privacy Handbook
- A reference for the GnuPG tool.
- The Linux Documentation Project
- Free, high quality documentation for the Linux operating system.
- The Linux Kernel Documentation
- The top level of the kernel’s documentation tree.
- Tor Bridges
- Bridges for several types of Pluggable Transports, which can help obfuscate your connections to the Tor Network, making it more difficult for anyone watching your internet traffic to determine that you are using Tor.
- Tor Browser User Manual
- Private browsing without tracking, surveillance, or censorship.
- Unified Extensible Firmware Interface Specifications
- The UEFI specifications.
- UNIX BSD Linux SunOS HP-UX & Perl Man Pages
- Large collection of man pages available in ASCII Text, Postscript, PDF, and HTML.
- Vim Help Files
- HTML version of the Vim help pages.
- The Official YAML Web Site
- A human-friendly data serialization language for all programming languages.