Linux
Linux Fundamentals
Get comfortable on the command line, the hacker home turf.
linuxbashcli
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Setting Up Your Free Practice Lab
Two ways to start — browser-only, or a free isolated Kali Linux VM. Step by step.
beginnerlabkali
Start Here
The Linux Terminal, From Zero
What a terminal is, how to read the prompt, and ten commands you will use forever — try each one.
beginnerlinuxterminal
Linux
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Linux Privilege Escalation
From a low shell to root.
linuxprivescsuid