Install MongoDB on RHEL 10 | CentOS 10
Learn how to install MongoDB (Community or Enterprise) on RHEL 10 / CentOS 10 with step‑by‑step repository setup, CLI commands, SELinux tips, and troubleshooting.” Table of Contents 🔈Introduction MongoDB is a leading NoSQL document database often used in production and development environments. If your organization is running RHEL 10 or CentOS 10, you may want to deploy […]
Fixing the Apache Error: Invalid Command ‘Header’
Learn how to fix the Apache error “Invalid command ‘Header’” when configuring a web server. Step-by-step guide with CLI commands, configuration examples, and troubleshooting tips to get your Apache server running smoothly. Table of Contents 🔈Introduction When running a web server, nothing is more frustrating than Apache failing to start because of a cryptic configuration […]
Install XRDP on Ubuntu 24.04 for Remote Desktop Access
Learn how to install and configure XRDP on Ubuntu 24.04 LTS to enable secure remote desktop access from Windows, macOS, or Linux. Step‑by‑step setup with firewall rules, troubleshooting tips and performance/security best practices. Table of Contents 🔈Introduction Remote desktop access to Linux machines is essential for administrators, remote workers, developers, or anyone needing GUI access […]
20 Commonly Used SPL Commands in Splunk (With Examples)
Explore 20 commonly used SPL commands in Splunk, with example queries for stats, timechart, eval, eventstats, streamstats, rex, and more. Boost your Splunk search skills and write better dashboards and alerts. Table of Contents 🔈Introduction If you’re learning Splunk or even if you’ve been using it a while, knowing the right SPL (Search Processing Language) […]
How to Safely Migrate from MySQL to PostgreSQL (Step-by-Step)
Learn how to safely migrate your MySQL database to PostgreSQL with this step-by-step guide. Get tips on tools, data migration, schema conversion, and performance optimization. Table of Contents 🔈Introduction Migrating from MySQL to PostgreSQL is an important yet sometimes tricky process. Whether you’re moving to PostgreSQL for better performance, richer features, or scalability, understanding the […]
Upgrade to PHP 8.4 on Ubuntu 22.04 | 24.04
Upgrade to PHP 8.4 on Ubuntu 22.04 or 24.04 with this complete, step‑by‑step guide. Includes commands, configuration, Apache & Nginx setup, troubleshooting, and best practices to ensure a smooth migration. Table of Contents 🔈Introduction Modern PHP releases bring faster execution, new features, and better security. PHP 8.4, though still developing in mid‑2025, is increasingly adopted by developers. If you’re […]
How to Enable Fail2Ban to Block Repeated Failed Login Attempts on Linux
Learn how to configure Fail2Ban to block repeated failed login attempts on Linux. Step-by-step guide with commands, configuration examples, and security tips for SSH and other services. Table of Contents 🔈Introduction In today’s threat landscape, brute-force attacks are a common way attackers attempt to gain unauthorized access to Linux servers. A simple and effective defense […]
Set Up VLANs Using NMCLI on RHEL 9
Learn how to set up VLANs using nmcli on RHEL 9 with this step-by-step guide. Includes CLI examples, troubleshooting tips, and best practices for configuring VLAN interfaces in a Linux environment. Table of Contents 🔈Introduction In modern enterprise networks, Virtual LANs (VLANs) are essential for segmenting traffic, improving security, and optimizing performance. On Red Hat Enterprise […]
Upgrade Ubuntu‑22.04 to 24.04 in 5 Steps
Step‑by‑step guide: how to safely upgrade Ubuntu 22.04 LTS (“Jammy”) to Ubuntu 24.04 LTS (“Noble”) in 5 essential steps—backup, update, configure the upgrader, run the release upgrade, and verify clean‑up. Table of Contents 🔈Introduction Upgrading from Ubuntu 22.04 LTS (“Jammy Jellyfish”) to Ubuntu 24.04 LTS (“Noble Numbat”) is a major step forward: newer kernel, updated toolchains, long‑term support until […]
How to Configure Secure TLS Settings in Apache on RHEL 9 | CentOS Stream 9
Secure your Apache web server on RHEL 9 or CentOS Stream 9 with a hardened TLS configuration. Learn how to enable TLS 1.2/1.3, enforce strong ciphers, configure HSTS, and test your setup. Table of Contents 🔈Introduction Transport Layer Security (TLS) is the backbone of modern web encryption, ensuring data transmitted between clients and servers remains […]