https://omarmerroun.duckdns.org/tags/linux/Recent content in Linux on Omar Merroun | Security Research & ProjectsHugoen-usFri, 10 Apr 2026 00:00:00 +0000https://omarmerroun.duckdns.org/projects/homelab/Fri, 10 Apr 2026 00:00:00 +0000https://omarmerroun.duckdns.org/projects/homelab/A public-facing Linux server on Oracle Cloud, hardened from cloud console to service user. Deployed, run, and documented as the free-tier instance was decommissioned.https://omarmerroun.duckdns.org/posts/users-permissions/Thu, 26 Mar 2026 00:00:00 +0000https://omarmerroun.duckdns.org/posts/users-permissions/Three users, three roles, three blast radii. How I scoped permissions so compromise doesn’t cascade.https://omarmerroun.duckdns.org/posts/ssh-hardening/Wed, 18 Mar 2026 00:00:00 +0000https://omarmerroun.duckdns.org/posts/ssh-hardening/Within minutes of going live, bots were already knocking. Here’s how I locked them out.https://omarmerroun.duckdns.org/posts/infrastructure/Sun, 15 Mar 2026 00:00:00 +0000https://omarmerroun.duckdns.org/posts/infrastructure/Why I picked Oracle Cloud’s free tier and Oracle Linux for a production-style home lab.https://omarmerroun.duckdns.org/projects/lodestone/Sat, 01 Nov 2025 00:00:00 +0000https://omarmerroun.duckdns.org/projects/lodestone/A network packet capture and analysis tool written in C, built from the syscall up. Two capture paths, layered protocol parsers, TCP stream reassembly, and a small set of anomaly detectors.