How to Set Up GPU Passthrough on KVM for a High‑Performance Linux VM
A detailed, step‑by‑step guide to setting up GPU passthrough on KVM for Linux hosts. Learn how to enable IOMMU, bind your GPU to VFIO, configure hosts and guests, avoid common issues, and unlock near‑native GPU performance in your virtual machine. Table of Contents 🔈Introduction If you want to squeeze out every bit of performance in […]
Splunk Email Security Risk: How to Fix allowedDomainList Warning in alert_actions.conf
Learn how to fix the Splunk allowedDomainList security warning in alert_actions.conf. Prevent unauthorized alert emails and protect sensitive data by configuring domain restrictions correctly. Table of Contents 🔈Introduction Splunk administrators often encounter a critical security warning: ⚠️ Found an empty value for ‘allowedDomainList’ in the alert_actions.conf configuration file. This alert points to a significant security misconfiguration […]
Five Common MongoDB Indexing Mistakes That Kill Performance
Avoid MongoDB performance pitfalls by learning five common indexing mistakes that slow down your database. Includes CLI examples, charts, and actionable fixes. Table of Contents 🔈Introduction MongoDB is renowned for its flexibility and scalability as a NoSQL database, but when it comes to performance, indexing is everything. A well-designed index can make queries blazingly fast, while […]
Install Splunk on RHEL 9 or CentOS 9: A Beginner’s Guide
Learn how to install Splunk on RHEL9 or CentOS 9 with this beginner-friendly guide. Step-by-step instructions, CLI examples, and troubleshooting tips included. Table of Contents 🔈Introduction Splunk is one of the most widely-used platforms for searching, monitoring, and analyzing machine-generated big data. Whether you’re managing logs, monitoring system performance, or troubleshooting issues, Splunk is an […]
How to Monitor SSH Logins Using Auditd and Logwatch
Learn how to monitor SSH logins using Auditd and Logwatch on Linux. This step-by-step guide covers setup, configuration, log analysis, and reporting to enhance server security. Table of Contents 🔈Introduction Secure Shell (SSH) is one of the most widely used methods for remote server administration. Because it provides a gateway into critical infrastructure, monitoring SSH […]
Configure a Firewall using UFW (Ubuntu) and Firewalld (RHEL)
Learn how to configure a Linux firewall using UFW on Ubuntu and Firewalld on RHEL. Step-by-step CLI examples, best practices, and comparison tables included. Table of Contents 🔈Introduction Securing your Linux server is a critical step in system administration. One of the foundational layers of server security is the firewall — a system that controls […]
How to Configure SSL for Splunk Enterprise on RHEL 9 | CentOS 9
Learn how to configure SSL for Splunk Enterprise on RHEL 9 or CentOS 9. This detailed guide covers certificate generation, secure web interface setup, and SSL forwarding configuration for maximum security. Table of Contents 🔈Introduction Securing your Splunk Enterprise deployment is crucial, especially when dealing with sensitive data and enterprise-level monitoring. One of the most […]
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 […]