Installing and using Collectd on RHEL 9 | CentOS 9
Learn how to install and configure Collectd on RHEL 9 and CentOS 9 for system performance monitoring. This step-by-step guide covers installation, setup, configuration, and usage to help you monitor system metrics efficiently. Table of Contents đIntroduction Monitoring system performance is crucial to maintaining the health and stability of your server environment. On RHEL 9 and CentOS 9, […]
Understanding Enterprise Network Infrastructure: From Perimeter to Core
A complete guide to enterprise network infrastructureâcovering DMZ, firewalls, core networks, and hybrid cloud integration. Includes best practices, CLI examples, and design tables for IT professionals. Table of Contents đIntroduction In todayâs digital enterprise, the network infrastructure is the foundation that supports communication, application delivery, and cybersecurity. As organizations scale and hybridize their environments, a […]
Securing MongoDB with TLS | SSL on RHELâŻ9
Learn how to secure MongoDB on RHELâŻ9 using TLS / SSLâstep-by-step instructions for certificate setup, configuring mongod, enforcing client authentication, and troubleshooting. Table of Contents đIntroduction Transport Layer Security (TLS) / SSL is essential to protect MongoDB traffic from eavesdropping and man-in-the-middle attacks. In this guide, youâll learn how to enable TLS for mongod or […]
Configuring Bonded Interfaces and VLANs Together on RHELâŻ9
Learn how to configure a bonded interface with VLAN tagging on RHELâŻ9: a stepâbyâstep guide using nmcli and nmstatectl, architectural best practices, troubleshooting tips, and examples. Table of Contents đIntroduction In modern data centers, combining interface bonding (link aggregation or redundancy) with 802.1Q VLAN tagging is a common requirement. In RHELâŻ9, you can create a bond […]
Harden SSH on Ubuntu 24.04: Disable Root, Use Key Auth, Restrict IPs
Learn how to harden SSH on Ubuntu 24.04. Disable root login, enforce SSH key authentication, and restrict IP access for maximum protection. Table of Contents đIntroduction Secure Shell (SSH) is the backbone of remote system management, but an exposed or misconfigured SSH service is a prime target for attackers. Ubuntu 24.04, as a modern Linux […]
How to Build a Responsive Dashboard with React and Tailwind CSS on RHEL 9 | CentOS 9
Learn how to build a responsive React dashboard with Tailwind CSS on RHEL 9 or CentOS Stream 9. Includes CLI commands, deployment tips, and full code examples. Table of Contents đIntroduction Deploying modern frontend applications in enterprise environments like RHEL 9 or CentOS Stream 9 comes with its own challenges, from package management to security […]
How to Set Up GPU Passthrough on KVM for a HighâPerformance Linux VM
A detailed, stepâbyâstep 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 nearânative GPU performance in your virtual machine. Table of Contents đIntroduction 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 đIntroduction Splunk administrators often encounter a critical security warning: â ď¸Â 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 đIntroduction MongoDBÂ 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 đIntroduction Splunk is one of the most widely-used platforms for searching, monitoring, and analyzing machine-generated big data. Whether youâre managing logs, monitoring system performance, or troubleshooting issues, Splunk is an […]