MariaDB Galera Cluster is a synchronous multi-primary cluster for MariaDB/MySQL that provides true high availability with no single point of failure. Unlike standard primary-replica replication where only one node accepts writes and replicas are read-only, Galera Cluster allows writes to any node simultaneously — all nodes are always primary, always in sync, and always up-to-date. […]
Introduction Deploying set up mariadb replication on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base + ports […]
MongoDB is a leading NoSQL document database that stores data as flexible JSON-like BSON documents. MongoDB 8 introduces improved aggregation performance, enhanced time series collections, and better sharding. This guide installs MongoDB 8 Community Edition on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS server A user with sudo […]
Introduction This guide explains how to Configure MySQL Binary Log on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained […]
After spinning up a fresh Ubuntu 26.04 LTS server, a few essential steps harden the system, create a non-root administrative account, and prepare it for production workloads. This guide walks through every step from first login to a locked-down, up-to-date server. Tested and valid on: Ubuntu 26.04 LTS Prerequisites A fresh Ubuntu 26.04 LTS server […]
🟠 High ⏱ 5–30 min Last verified: 5 July 2026 Affected versions: RHEL 10 📖 ~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 & […]
🔴 Critical ⏱ 5–30 min Last verified: 3 July 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]
ClamAV is the most popular open-source antivirus engine for Linux. While Linux malware is less common than on other platforms, ClamAV is valuable for scanning files shared with Windows users, email servers, and web upload directories. This guide installs and configures ClamAV on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu […]
Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying set up mysql master-replica replication both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up MySQL Master-Replica Replication on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]
🟡 Medium ⏱ 5–30 min Last verified: 2 July 2026 📖 ~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 […]
