home page of the apache software foundation

friendly linux forum

since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

spinics.net is mostly mailing list archives these days

red hat is the world’s leading provider of enterprise open source solutions, including high-performing linux, cloud, container, and kubernetes technologies.

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.

q&a for ubuntu users and developers

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.