Content mill. They throw trash at you to get you on the website. Examples that you think will help will break. They don't think through because they don't care.
NixCraft is an online community of new and seasoned Linux / Unix sysadmins who want to make the most of sysadmin-hood.
Mission
Our mission is simple. We research and post cutting edge topics related to various open source software:
Enterprise Linux distributions.
Traditional Unix operating systems like OpenBSD/AIX/HP-UX etc.
Cloud computing.
Building scalable and high availability infrastructure.
Networking/DNS/Web/Proxy/office servers.
Security and firewalls.
Automation and infrastructure deployment.
Desktop Linux.
Apple OS X Unix operating systems.
Best practices for sysadmin.
Our tutorials are easy to follow and includes plenty of screenshots/screencasts.