freebsd is an operating system used to power modern servers, desktops, and embedded platforms.

the main openssh page

news and feature lists of linux and bsd distributions.

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.

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

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

debian is an operating system and a distribution of free software. it is maintained and updated through the work of many users who volunteer their time and effort.

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.

the website of gentoo, a flexible linux distribution.