How to Install Deno on RHEL 7 Deno is a modern, secure runtime for JavaScript and TypeScript built on V8 and Rust. Created by Ryan Dahl — the original author of Node.js — Deno was designed to address architectural decisions in Node.js that became pain points over time: no built-in TypeScript support, a complex and […]
How to Install and Use Fluentd for Log Aggregation on RHEL 7 Log aggregation is a critical discipline in any production environment: raw log files scattered across dozens of servers are nearly impossible to correlate during an incident. Fluentd, distributed as the td-agent package by Treasure Data, is an open-source data collector written in Ruby […]
The Prometheus Blackbox Exporter probes external endpoints over HTTP, HTTPS, TCP, ICMP, and DNS and exposes the results as Prometheus metrics. Unlike Node Exporter, which reports host-level statistics, the Blackbox Exporter answers the question “can this URL be reached right now?” — making it the right tool for synthetic uptime monitoring and SLA measurement. This […]
How to Install MongoDB on RHEL 7 MongoDB is a document-oriented NoSQL database that stores data in flexible, JSON-like BSON documents rather than traditional rows and columns. Its schema-less design makes it an excellent choice for applications that need to handle varied or rapidly evolving data structures, such as content management systems, real-time analytics platforms, […]
Docker networking determines how containers communicate with each other, with the host, and with external networks. RHEL 8 adds a layer of complexity because Docker writes its own iptables rules at startup, which can interact unexpectedly with firewalld — the default firewall manager on RHEL 8. Understanding Docker’s network drivers and how they map to […]
How to Install PHP on RHEL 7 PHP is the most widely used server-side scripting language for web development, powering applications ranging from simple contact forms to enterprise content management systems. Red Hat Enterprise Linux 7 ships with an older version of PHP in its base repositories, so for modern frameworks and security patches you […]
How to Install Java and Configure JAVA_HOME on RHEL 7 Java remains one of the most widely deployed application runtimes in enterprise environments, and RHEL 7 provides excellent support for running OpenJDK through its official repositories. Whether you are deploying a Spring Boot application, running Apache Tomcat, building microservices, or working with big data frameworks […]
How to Install containerd as a Container Runtime on RHEL 7 containerd is a high-performance, industry-standard container runtime that serves as the foundation beneath both Docker and Kubernetes. When Kubernetes deprecated the Dockershim in version 1.20 and removed it in version 1.24, containerd became the most widely adopted direct container runtime for Kubernetes clusters. Installing […]
DNS Security Extensions (DNSSEC) protect against cache poisoning and spoofing by cryptographically signing DNS records. On RHEL 8, you can enforce DNSSEC validation using either BIND 9 or Unbound, both available in the default repositories. This tutorial walks through configuring a validating resolver, testing zone signatures, and detecting failures. Securing your resolver is a foundational […]
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 […]
