Archives: NOC Articles

A practical, no-fluff guide to setting up a custom domain on GitHub Pages: CNAME file, DNS records, TLS and troubleshooting — straight from real field experience.

A quick 7-step guide to fixing an AlmaLinux kernel panic on boot, with a diagnosis table, GRUB and dracut commands, and journalctl log analysis.

Complete software RAID setup with mdadm on AlmaLinux 8/9 — install, create the array, mount, simulate drive failure, and rebuild. Production-ready.

How to configure Memcached on cPanel with LiteSpeed: install the daemon, load the PHP extension, wire up LiteSpeed Cache, and verify cache hits.

Five safe ways to share large files online that NOC teams actually use, from SFTP to file encryption. Full commands and troubleshooting included.

Complete AlmaLinux kernel tuning guide for production: sysctl network, filesystem, and memory parameters, GRUB boot options, plus troubleshooting and best practices.

Complete 7-part NOC incident post-mortem template: summary, timeline, root cause, action items, plus a real example and tips to prevent repeat incidents.

Complete guide to fixing the CVE-2026 Exim vulnerability (RCE, CVSS 9.8): upgrade to Exim 4.99.5 with version detection, GnuTLS checks, per-OS commands, verification, plus a full CVE-2026 table.

How to optimize VPS CPU for heavy workloads: diagnose load average, tune PHP-FPM, control process priority, fix cron scheduling, and set up monitoring.

Complete Nginx reverse proxy setup guide for VPS: server block config, Let’s Encrypt TLS, and troubleshooting 502 and 504. A practical checklist you can follow end to end.