nixCraft

Learn Linux step by step. From command line basics to system administration.

Home networking tutorials. OPNsense, VLANs, and network security.

Learn the Linux command line. Classic, comprehensive tutorial on shell scripting and Unix command-line tools.

Curated list of open source sysadmin resources. Monitoring, backup, configuration management, and more.

Curated list of project-based tutorials. Learn by building real projects in various languages.

Master programming by recreating technologies from scratch. Build your own Git, Docker, database, etc.