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Optimizing PHP 8.x on CentOS Stream 9: Real-World PHP-FPM and OPcache Tuning Tips

By admin May 9, 2026

A guide to optimizing PHP 8.x on CentOS Stream 9 based on real-world experience. Learn how to fine-tune PHP-FPM and OPcache for peak performance, lower CPU load, and reduced RAM usage.

Virtualization

Deploying MicroVMs with Firecracker: When Virtual Machines Are Lightweight and Boot in a Flash

By admin May 9, 2026

A guide to deploying Firecracker MicroVMs on Linux—AWS's ultra-lightweight virtual machine solution. Boot in just 125ms with minimal resource consumption, ideal for Serverless.

Linux

Debug Linux like a “Wizard” with eBPF and BCC Tools: Peer into the Kernel Without Code Changes

By admin May 9, 2026

Learn how to use eBPF and BCC Tools on Linux to debug complex performance issues at the kernel level without modifying or restarting your applications.

MySQL

Optimizing MySQL 8 with EXPLAIN ANALYZE: Don’t Let the Optimizer Mislead You

By admin May 9, 2026

Don't let the MySQL Optimizer mislead you with predicted numbers. Learn how to use EXPLAIN ANALYZE to accurately measure every millisecond of execution and optimize queries effectively.

VMware

Building Custom VMware ESXi ISOs: The Ultimate Fix for Missing NIC and NVMe Drivers

By admin May 9, 2026

Learn how to build custom VMware ESXi ISOs to integrate Realtek and Intel I225-V network drivers. The perfect solution for HomeLabs on Mini PCs and NUCs not officially supported by VMware.

VMware

vSphere Security: Hands-on Lockdown Mode, Certificates, and ESXi Host Hardening

By admin May 9, 2026

Practical vSphere security handbook: Learn how to configure Lockdown Mode, perform ESXi hardening via CLI, and manage professional Certificates to protect your virtual infrastructure against malware.

Centos

Centralized Logging with Rsyslog on CentOS Stream 9: Streamline logs for peace of mind

By admin May 9, 2026

Centralized log management is a vital skill for DevOps. Learn how to configure Rsyslog on CentOS Stream 9 to consolidate logs from dozens of servers into one place, making debugging 5x faster.

MySQL

MySQL SSL/TLS: Don’t Let Your Data Go “Naked” in Transit (mTLS Configuration Guide)

By admin May 9, 2026

Don't let your MySQL data be intercepted. Here is a detailed guide on configuring SSL/TLS and mTLS for maximum security between your application and database server.

Security

Hardening WordPress for SysAdmins: “Root-Level” Security from Web Server to Source Code

By admin May 9, 2026

Practical WordPress hardening experience for SysAdmins: blocking Nginx attacks, strict file system permissions, and secure wp-config.php tuning for production servers.

Security

Configuring HTTP Security Headers: ‘Armor’ for Nginx and Apache to Achieve A+ Standard

By admin May 9, 2026

Installing SSL (HTTPS) is just the beginning. To truly block Clickjacking and XSS, you need a powerful set of HTTP Security Headers. Upgrade your security in 5 minutes.