SELinux vs Fapolicyd on RHEL 8/9: What’s the Difference and Why You Need Both
Compare SELinux and fapolicyd on RHEL 8/9. Learn the core differences between Mandatory Access Control (SELinux) and Application Whitelisting (fapolicyd), why both are essential for a robust defense-in-depth strategy, and how to manage their policies for ultimate system hardening. Table of Contents 🔈Introduction In today’s complex threat landscape, securing a Red Hat Enterprise Linux (RHEL) […]
Migrate Zabbix 6.4 to Zabbix 7.0 LTS
Comprehensive step-by-step guide to migrate Zabbix 6.4 to Zabbix 7.0 LTS for MySQL and PostgreSQL. Includes pre-checks, database commands, schema upgrades, and rollback instructions. Table of Contents 🔈Introduction Upgrading your Zabbix monitoring platform from version 6.4 to version 7.0 LTS is a strategic move that ensures long-term support, improved scalability, and enhanced performance. Active support […]
Configuring Kubernetes Worker Nodes on Baremetal Linux
A complete step-by-step guide to configuring Kubernetes worker nodes on baremetal Linux, covering OS preparation, networking, storage, kubelet tuning, cluster joining, and performance optimization. Table of Contents 🔈Introduction Running Kubernetes on baremetal Linux servers gives teams full control over performance, networking, hardware utilization, and costs. While managed cloud clusters often reduce infrastructure complexity, baremetal Kubernetes […]
How to Convert Ext4 Filesystems to Btrfs with Minimal Downtime
Self-explanatory placeholder (typically) matches the keyword catch phrase statement. Table of Contents 🔈Introduction Migrating from Ext4 to Btrfs has become a common objective for Linux administrators who want advanced features—snapshots, transparent compression, checksumming, incremental send/receive, and more—without sacrificing stability. While Ext4 remains a reliable, mature filesystem, Btrfs brings modern capabilities that support better data integrity, […]
How to Analyze and Reduce Linux I/O Latency Using fio, blktrace, and perf
Learn how to analyze and reduce Linux I/O latency with tools like fio, blktrace, and perf. Optimize disk performance to improve throughput, latency, and system efficiency. Table of Contents 🔈Introduction In the world of high-performance computing and data-driven applications, disk I/O latency can often be the Achilles’ heel for system performance. Whether you’re running a […]
The Differences Between Kanban and Agile Methodology
Learn the key differences between Kanban and Agile methodology, including workflows, planning styles, performance metrics, and best use cases. Understand when to use Kanban, when Agile is more effective, and how hybrid approaches like Scrumban can benefit teams. Table of Contents 🔈Introduction In modern software development and project management, teams aim to deliver high-quality work […]
How to Benchmark and Optimize Disk Performance on Linux with fio
Learn how to benchmark and optimize disk performance on Linux using fio. This comprehensive guide covers installation, test scenarios, interpreting results, and tuning tips to maximize throughput and minimize latency. Table of Contents 🔈Introduction When you’re managing Linux systems—whether they’re servers, virtual machines, or embedded devices—understanding your disk performance is critical. The versatile utility fio […]
Install Grafana on RHEL 9 | CentOS 9
Learn how to install Grafana on RHEL 9 or CentOS 9—from repository setup through installation, service management, firewall & SELinux configuration, to securing your Grafana environment. Table of Contents 🔈Introduction If you’re working with Grafana and running a modern enterprise Linux environment like Red Hat Enterprise Linux 9 (RHEL 9) or CentOS Stream 9 (or a compatible EL9 distribution), […]
Using Rook-Ceph for Persistent Storage in On-Prem Kubernetes Clusters
Deploy resilient, scalable on-prem Kubernetes storage using Rook-Ceph. Learn architecture, setup steps, best practices, and examples for block, file, and object storage. Table of Contents 🔈Introduction Organizations running Kubernetes on-premises often discover that managing persistent storage is harder than deploying applications themselves. Public cloud platforms provide turnkey block and file storage services, but baremetal and […]
Install GIMP on RHEL 9 | CentOS 9
Learn how to install GIMP on RHEL 9, CentOS Stream 9, Rocky Linux 9, and AlmaLinux 9 using EPEL, Flatpak, or source builds. Includes step-by-step commands, troubleshooting tips, and comparisons for the best installation method. Table of Contents 🔈Introduction GIMP (GNU Image Manipulation Program) is one of the most widely used open-source graphics applications for […]