In 2025-2026, understanding how to open a port on Linux is essential for running services like web servers, databases, or custom apps. Ports act as communication endpoints: well-known ports (0-1023) are reserved for standard services (e.g., SSH 22, HTTP 80, HTTPS 443), while higher ports (1024+) suit user-defined applications.
In 2025, installing Java on Ubuntu remains essential for running applications like Tomcat, Jetty, Glassfish, Cassandra, and Jenkins. The Java Virtual Machine (JVM) powers these tools, and Ubuntu’s apt makes setup straightforward for both Java Runtime Environment (JRE) and Java Development Kit (JDK). This step-by-step how to install Java on Ubuntu guide covers OpenJDK (default, open-source) and Oracle JDK installations, managing multiple versions, setting JAVA_HOME, troubleshooting, and best practices. Whether you’re a developer or sysadmin, follow these instructions for a seamless setup on Ubuntu 22.04+.
In today’s digital landscape, implementing robust Linux server security best practices is crucial to protect against evolving threats like brute-force attacks, vulnerabilities, and data breaches. Neglecting server hardening during setup can expose your infrastructure to risks, leading to costly downtime or compromises.
phpMyAdmin is a popular web-based tool that lets you manage MySQL or MariaDB databases through a browser instead of the command line. This guide shows you how to install phpMyAdmin on Ubuntu, configure it with Apache, set up proper authentication, and — most importantly — secure it properly.
Configuring logging in Nginx on Ubuntu is essential for monitoring server performance, troubleshooting errors, and ensuring security. Whether you’re dealing with high-traffic websites or simple applications, knowing how to configure Nginx logging Ubuntu setups allows you to capture critical data without overwhelming your system. This comprehensive tutorial walks you through setting up access and error logs, implementing log rotation to manage disk space, and applying advanced configurations for optimal observability.
🟠 High ⏱ 5–30 min Last verified: 3 February 2026 Affected versions: RHEL 10 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 & […]
Introduction Setting up install netdata on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Install Netdata on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and how to validate the result on […]
Introduction How to Configure Docker Daemon TLS on Oracle Linux 10 on Oracle Linux 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 configuration […]
Introduction RHEL 10 ships with a stable, security-hardened base that makes deploying install deno both straightforward and auditable. This tutorial covers the complete procedure for how to Install Deno on RHEL 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. Prerequisites The procedure assumes you are […]
🟡 Medium ⏱ 10–30 min Last verified: 31 January 2026 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2026:1872-1 (see also SUSE bugzilla) Related CVEs: CVE-2026-4948 CVE-2016-5410 Upstream summary: A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) […]
