SELECT A LESSON TO BEGIN
Start from zero, leave as an operator. Master the OS that powers 90% of the internet — read the theory, run the commands, own the system.
Every Linux, Security+ and PenTest+ module in one library.
The full Security+ (SY0-701), PenTest+ (PT0-003), CCNA (200-301) and OWASP Top 10:2025 tracks, taught as lectures.
Hands-on terminal challenges with real command practice.
Red, Blue, and Purple team tracks tailored to your goal.
Deep-dive mini-courses on the tools of the trade.
Operator playbooks — the distro, the reasoning, the toolkit.
Navigate the shell, understand the filesystem, manipulate files and text. Foundation of everything.
Master users, groups, permissions, and understand privilege escalation vectors.
Build bash tools, automate recon, master text processing pipelines with grep, awk, and sed.
Map networks, understand TCP/IP, scan services, capture and analyze live traffic.
Kernel internals, memory forensics, binary analysis, and system hardening.
Each Lab drops you into an in-browser terminal simulator. Run real commands, receive realistic output, complete objectives, and unlock the next stage.