Step-by-step notes

Security playbooks

End-to-end concept guides with checklists, tool links, command references, case studies, and quiz IDs to verify understanding — fundamentals through OSINT, web, Linux hardening, and LLM defense.

Foundation

Cybersecurity fundamentals — end-to-end

CIA triad, risk, threats, controls, and how offense informs defense.

Roles: All paths, SOC, AppSec, GRC

Networking

Network security — ports, firewalls, HTTP

OSI/TCP-IP, segmentation, firewalls, DNS, TLS, and HTTP status codes for triage.

Roles: SOC, Network sec, Pentester

AppSec

Web application security — methodology

Recon → map → test auth/access → injection → logic → report.

Roles: AppSec, Bug bounty, Pentester

OSINT

OSINT reconnaissance — professional lane

Passive collection, correlation, reporting — full toolkit on /osint.

Roles: SOC, Threat intel, Bug bounty, Journalism

AI Security

LLM jailbreaking — techniques & defenses

How prompts bypass guardrails; how to defend RAG and agent apps.

Roles: AI sec engineer, AppSec, Red team (AI)

OSINT / Media

AI & synthetic image verification

Metadata, reverse search, visual forensics, and detector tools — combine evidence.

Roles: SOC, Fraud, Threat intel

System security

Linux hardening & audit

Baseline CIS-style hardening with Lynis and command-line verification.

Roles: Engineer, SOC, Cloud

Career

Defensive security & project ideas

Blue team is not 'lesser' — build detections, reduce OSINT footprint, automate response.

Roles: Student, Career switcher