Rocky Linux 9 2

1. 2026-10-19
   Linux / Rocky Linux 9 / Web server

   Fix Nginx proxy blocked by SELinux on Rocky Linux 9

   Tell whether a 502 and a Permission denied in error.log come from SELinux, fix it with a boolean, and label a custom document root.

   Rocky Linux 9 · per RHEL 9 SELinux documentation · 2026-10
2. Linux / Rocky Linux 9 / Basics

   See which process is listening on a port

   List listening TCP sockets with their processes, narrow to one port, and check that firewalld lets that port through.

   ss (iproute2) · Ubuntu 24.04 output · firewalld per RHEL 9 and firewalld docs (same family as Rocky 9)