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.

nginx 为世界上最繁忙的网站加速内容和应用的交付过程，并提高安全性、可用性和可扩展性。

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

kubernetes, also known as k8s, is an open-source system for automating deployment, scaling, and management of containerized applications. it groups containers that make up an application into logical units for easy management and discovery. kubernetes builds upon 15 years of experience of running production workloads at google, combined with best-of-breed ideas and practices from the community. planet scale designed on the same principles that allow google to run billions of containers a week, kubernetes can scale without increasing your operations team.

q&a for system and network administrators

q&a for ubuntu users and developers

in-depth, to-the-point tutorials on java, spring, spring boot, security, and rest.

docker is a platform designed to help developers build, share, and run container applications. we handle the tedious setup, so you can focus on the code.

an ocean of simple, scalable cloud solutions.

well organized and easy to understand web building tutorials with lots of examples of how to use html, css, javascript, sql, python, php, bootstrap, java, xml and more.