Linux & Networking
The operating system and network basics every server engineer uses.
Beginner
Start here. No background needed beyond school maths.
Introduction to Linux (LFS101)
A free self-paced course from the foundation behind Linux: the system, the shell, file systems and everyday administration.
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Practical Networking
Clear explanations with diagrams of how IP addressing, subnets, routing, DNS and firewalls work.
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Advanced
Once the basics are comfortable.
Beej's Guide to Network Programming
A friendly guide to writing networked programs in C with sockets, a good way to see how the internet works under the hood.
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Linux Man Pages Online
The manual pages for Linux commands, system calls and library functions, readable in the browser.
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