Linux & Networking
The operating system and network basics every server engineer uses.
Beginner
Start here. No background needed beyond school maths.
Course
Beginner
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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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Document
Beginner
↗ External site
Practical Networking
Clear explanations with diagrams of how IP addressing, subnets, routing, DNS and firewalls work.
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