Memcached is a high-performance, distributed memory object caching system used to speed up dynamic web applications by reducing database load. On RHEL 8, Memcached is available directly from the AppStream repository, making installation straightforward. In this tutorial you will install Memcached, tune its configuration, restrict network access to trusted hosts only, and verify the setup […]
ClickHouse is an open-source columnar database management system designed for real-time analytical queries over large datasets. Unlike row-oriented databases such as MySQL or PostgreSQL, ClickHouse stores data by column, allowing it to scan only the columns needed for a query and apply aggressive compression, resulting in query performance orders of magnitude faster for analytical workloads. […]
SQLite is a serverless, file-based relational database engine that requires no installation of a separate server process and no ongoing administration. It stores an entire database — tables, indexes, and data — in a single cross-platform file, making it ideal for development environments, embedded applications, configuration stores, and lightweight production workloads that do not need […]
MySQL ships with several default settings and accounts that must be hardened before the server handles production data. On RHEL 8, the combination of mysql_secure_installation, strict privilege grants, TLS enforcement, and the audit log plugin provides a strong baseline. This tutorial walks through each layer of MySQL security so that nothing is left at its […]
Regular database backups are one of the most important operational habits for any MySQL deployment, and RHEL 8 provides all the tools you need to implement a solid backup strategy. mysqldump produces portable SQL dumps that are easy to restore and inspect, while mysqlpump adds parallelism for faster exports on larger datasets. This tutorial covers […]
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 […]
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 […]
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 […]
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