How to Install Node.js on RHEL 7 Node.js is a server-side JavaScript runtime built on Chrome’s V8 engine. It is widely used for building REST APIs, real-time applications, microservices, and command-line tooling. Red Hat Enterprise Linux 7 does not ship a recent version of Node.js in its default repositories, so several installation methods are available […]
Introduction to Prometheus and Grafana Monitoring on Windows Server 2019 Prometheus is an open-source time-series monitoring system originally developed at SoundCloud, now a Cloud Native Computing Foundation (CNCF) project. It collects metrics by scraping HTTP endpoints exposed by exporters on monitored systems. Grafana is a visualization and dashboarding platform that queries Prometheus (and many other […]
How to Secure Nginx with Let’s Encrypt and Certbot on RHEL 7 Let’s Encrypt is a free, automated, and open Certificate Authority (CA) that provides SSL/TLS certificates to enable HTTPS on your web server. Certbot is the official client tool for obtaining and renewing Let’s Encrypt certificates. On RHEL 7, Certbot is available through the […]
How to Configure Kubernetes Persistent Volumes and Storage Classes on RHEL 7 By default, storage inside a Kubernetes Pod is ephemeral — when a Pod restarts or is rescheduled, all data written to the container filesystem is lost. For applications like databases, file servers, and message queues that require durable storage, Kubernetes provides a storage […]
How to Install Zabbix Agent on Windows Server 2012 R2 for Monitoring Zabbix is a widely deployed open-source monitoring platform that provides comprehensive monitoring for servers, applications, databases, and network devices. The Zabbix agent installed on Windows Server 2012 R2 collects system metrics, monitors services, checks log files for patterns, and executes custom checks, all […]
🟡 Medium ⏱ 5–30 min Last verified: 17 June 2019 Affected versions: Ubuntu 14.04 LTS 📖 ~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 & Hardening Related Errors […]
Introduction FreeBSD 12 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up carp high availability on freebsd 12 on FreeBSD 12 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any […]
Introduction to SCCM on Windows Server 2019 System Center Configuration Manager, now rebranded as Microsoft Endpoint Configuration Manager (MECM) or simply Configuration Manager (ConfigMgr), is Microsoft’s enterprise-grade solution for managing large numbers of computers. It provides OS deployment, software distribution, patch management, inventory, compliance assessment, and remote control capabilities across thousands of machines. Setting up […]
Introduction This tutorial covers How to Configure Resource Limits in Kubernetes on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Disable Swap swapoff -a sed -i ‘/ […]
Introduction How to Install Scala and sbt on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. […]
