the main openbsd page

ssh is a defensive cybersecurity company offering software solutions for privileged access, secure file transfers, ssh key management, quantum-safe & more.

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.

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

博客园是一个面向开发者的知识分享社区。自创建以来，博客园一直致力并专注于为开发者打造一个纯净的技术交流社区，推动并帮助开发者通过互联网分享知识，从而让更多开发者从中受益。博客园的使命是帮助开发者用代码改变世界。

ubuntu is the modern, open source operating system on linux for the enterprise server, desktop, cloud, and iot.

php is a popular general-purpose scripting language that powers everything from your blog to the most popular websites in the world.