Articles › Security Engineering

Security Engineering

Threat modeling, secure design patterns, and the craft of building security into systems.

• 
  October 18, 2026 How to Check Which Users Have Sudo Access on a Linux Host

  Find every user with sudo access on a Linux host: check sudo groups, read sudoers and sudoers.d, list effective privileges per user, and flag the risky rules.

• 
  October 10, 2026 How to Find World-Writable Files in Linux

  Find world-writable files and directories in Linux with find, work out which ones are a privilege-escalation risk, and fix them without breaking anything.

• 
  September 28, 2026 How to Decode and Inspect a JWT Token (Without Sending It Anywhere)

  Decode and read JWT token claims locally from the command line — no jwt.io, no third-party sites, no copy-pasting production tokens into a browser tab.