Archives: NOC Articles

A calm, practical walkthrough of tuning Linux dirty ratio and dirty_background_ratio so writeback stays smooth, with safe defaults, verification steps, and a troubleshooting table.

How to build an automated daily NOC report template with bash and cron, from setup to automatic morning email delivery.

Complete guide to fixing Nginx 502 Bad Gateway upstream errors. From reading logs, checking PHP-FPM and OOM, to crash-proof tuning. Step-by-step 2026.

Complete guide to setting up Docker containers on a VPS: install Docker Engine, Compose, hardening, autostart, and troubleshooting. Let’s get to work.

Complete guide to securing SSH login on Linux with fail2ban — install, configure the sshd jail, and test brute force protection. Built for production servers.

Step-by-step guide to fixing Windows Server time sync with w32time: diagnose status, configure NTP, set the PDC Emulator, check UDP 123, and reset the service.

A practical guide to fixing the CVE-2026 BIND DNS vulnerability on production servers. 7 steps from version check to patch verification, with commands and troubleshooting.

Audit user activity on a linux server with 5 practical steps: trace logins, sudo commands, and file changes using built-in tools.

7 practical steps to optimize VPS CPU for heavy workloads: profiling, CPU steal checks, worker pool tuning, caching, and monitoring. Ready to apply right now.

Complete guide to server screenshot automation with Python, Playwright, and cron jobs. Five practical steps from installation to file rotation.