August 2025Monthly Archives

Introduction The MERN stack, which includes MongoDB, Express.js, React, and Node.js, is one of the top choices for building full-stack JavaScript applications. It allows developers to create dynamic, scalable, and high performance web apps using just one language, JavaScript, for both the frontend and backend. This guide will take you… Continue Reading Beginner’s Guide to Building a Full-Stack MERN Application

Introduction: The Raspberry Pi isn’t just a hobbyist gadget – it’s powerful enough to run servers, monitor networks, and support real IT operations. One of the best tools for monitoring infrastructure is Zabbix, an open-source monitoring solution used by enterprises worldwide. Prerequisites: Before starting the installation, make sure you have… Continue Reading How to Install Ubuntu Server and Zabbix on Raspberry Pi

1. Introduction iptables is a powerful firewall utility available in Linux systems that allows administrators to control incoming and outgoing network traffic. One common use case is blocking traffic from a specific IP address to protect a server from malicious activity, repeated failed login attempts, or excessive requests. This document… Continue Reading Blocking an IP Address using iptables

Introduction HashiCorp Vault is widely used for secure secret management. One of its key features is fine-grained access control via policies and tokens. Vault tokens are used to authenticate and access secrets stored in HashiCorp Vault. To keep access secure, it is best practice to tie tokens to specific policies… Continue Reading How to Create and Revoke Vault Tokens Against a Policy