MySQL primary-replica replication allows one database server (the primary) to stream changes to one or more replica servers in near real-time, providing read scalability and a warm standby for disaster recovery. On RHEL 8, the setup involves editing MySQL configuration files on both servers, creating a dedicated replication user, and issuing a handful of SQL […]
phpMyAdmin is a popular web-based interface for managing MySQL and MariaDB databases, offering a graphical alternative to the command line. On RHEL 8, you can install it quickly from the EPEL repository, which provides community-maintained packages not included in the default RHEL channels. After installation, a few configuration steps secure access and integrate phpMyAdmin with […]
Redis is an in-memory data structure store used as a database, cache, and message broker, capable of delivering sub-millisecond response times for millions of operations per second. On RHEL 8, Redis is available through the AppStream module system, giving you a straightforward installation path without third-party repositories. This guide covers installing Redis 6 via AppStream […]
MongoDB is a leading document-oriented NoSQL database that stores data in flexible JSON-like BSON documents, making it well-suited for applications with evolving schemas, hierarchical data, or high-throughput write workloads. MongoDB is not included in the RHEL 8 AppStream, so you must add the official MongoDB repository before installing. This guide walks through creating the MongoDB […]
PostgreSQL is a powerful, standards-compliant open-source relational database known for its extensibility, advanced data types, and strict ACID compliance. RHEL 8’s AppStream makes multiple PostgreSQL major versions available as installable modules, so you can target a specific release without managing external repositories. This guide demonstrates installing PostgreSQL 13 via the AppStream module system, initialising the […]
MariaDB is a community-developed, fully open-source relational database management system that was forked from MySQL and remains highly compatible with it. On RHEL 8, MariaDB is conveniently available through the AppStream module system, allowing you to install a specific stream version without adding third-party repositories. This tutorial covers installing MariaDB 10.5 via AppStream, starting and […]
MySQL 8 is one of the most widely deployed relational database systems in the world, offering robust performance, strong security features, and broad application compatibility. On RHEL 8, MySQL is not included in the default AppStream modules, so you must add the official MySQL community repository before installing. This guide walks through adding the MySQL […]
Prometheus is a widely adopted open-source monitoring system that collects time-series metrics by scraping HTTP endpoints. Nginx does not expose Prometheus-format metrics natively, but the official nginx-prometheus-exporter bridges the gap by reading Nginx’s built-in stub status page and converting it into a format Prometheus understands. This tutorial shows how to enable the stub status module […]
A default Nginx installation exposes version information in response headers, accepts legacy TLS protocols, and sends no browser security directives — all of which reduce your attack surface score and leave clients vulnerable to clickjacking, MIME sniffing, and downgrade attacks. Hardening Nginx on RHEL 8 involves a series of targeted configuration changes: suppressing the server […]
WebSockets provide a persistent, full-duplex communication channel over a single TCP connection, making them essential for real-time applications such as chat systems, live dashboards, and collaborative tools. Nginx can act as a reverse proxy that transparently upgrades incoming HTTP connections to the WebSocket protocol and forwards them to a backend application server. This tutorial walks […]
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