lsof Open Files & Ports Audit: Linux Security Guide

lsof (list open files) is one of the most powerful Linux diagnostic tools. It reveals open files, network connections, and potential security issues.

Why lsof Matters

Every network connection and file access is visible through lsof. Security teams use it to detect unauthorized access and data exfiltration.

Key Commands

lsof -i -P -n\nlsof -i :80\nlsof -u username\nlsof +D /directory\nlsof | grep deleted

Automated Auditing

pip install dargslan-lsof-audit\nlsof-audit\nlsof-audit --json\nlsof-audit --ports

Install the full toolkit: pip install dargslan-toolkit (107 tools)

Resources

Download our lsof cheat sheet PDF and browse 210+ eBooks.