Swap space acts as overflow memory. When the physical RAM is full, the Linux kernel moves the least-recently-used memory pages to swap on disk, freeing physical RAM for active processes. Without swap, when RAM is exhausted the Out of Memory (OOM) killer terminates processes — often the largest one, which is frequently your database or […]
🔴 Critical ⏱ 5–30 min Last verified: 14 January 2025 Affected versions: Debian 12 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]
🟡 Medium ⏱ 5–30 min Last verified: 11 January 2025 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]
How to Set Up Windows Server Failover Cluster (WSFC) with SQL Server on Windows Server 2025 High availability for SQL Server workloads on Windows Server 2025 is most commonly achieved through Windows Server Failover Clustering (WSFC). WSFC provides the underlying cluster infrastructure that SQL Server relies on for two of its primary HA technologies: Failover […]
How to Use PowerShell for Automated Deployments on Windows Server 2025 Automated deployments are the backbone of modern DevOps pipelines, and PowerShell remains the most powerful tool available on Windows Server 2025 for orchestrating them. Whether you are deploying a web application to IIS, installing a Windows Service across a server farm, or managing rolling […]
Introduction How to Set Up MySQL with SSL on CentOS Stream 10 on CentOS Stream 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]
🟡 Medium ⏱ 5–30 min Last verified: 8 January 2025 Affected versions: Ubuntu 24.04 LTS 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]
PHP 8.3 brings performance improvements, typed class constants, the json_validate() function, and various engine enhancements over PHP 8.2. This guide installs PHP 8.3 on Ubuntu 24.04 LTS using the Ondrej PPA — the most up-to-date source for PHP on Ubuntu. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server A user with […]
How to Configure Windows Firewall with Advanced Security on Windows Server 2025 Windows Defender Firewall with Advanced Security (WFAS) is one of the most critical security controls available on Windows Server 2025. Unlike the simplified firewall interface available in Control Panel, WFAS exposes the full depth of Windows Filtering Platform capabilities — including granular inbound […]
How to Configure Network Load Balancing (NLB) on Windows Server 2025 Network Load Balancing (NLB) is a built-in Windows Server feature that distributes incoming TCP/IP traffic across multiple servers using a software-based approach that requires no dedicated hardware. On Windows Server 2025, NLB remains a viable option for distributing load across IIS web farm nodes, […]
