Technology

AWS Pricing Models, Cost Optimization Best Practices, and Billing Tools (Deep Technical Guide)

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Cloud environments are fundamentally consumption-based, and understanding pricing models is critical to designing cost-efficient architectures. AWS provides multiple compute pricing models, various storage optimization layers, and advanced billing & forecasting tools. This guide breaks down the technical mechanisms behind On-Demand, Reserved Instances, and Savings Plans, how they apply to real-world workloads, and how engineering teams … Read more

Best Practices for Creating Containerized Applications

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Build secure, portable, and production-ready containers like a pro. Containerized applications have transformed the way we build, ship, and deploy software. By packaging an app with all its dependencies into a container, teams can ensure consistent environments from development to production. But creating a containerized app isn’t just about writing a Dockerfile. To ensure performance, … Read more

Firewalld vs UFW: Which Linux Firewall Should You Use?

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As a system administrator, you’re responsible for more than just uptime — you’re also the gatekeeper of your infrastructure’s security. One of the most effective yet often overlooked tools in your toolbox is the Linux firewall. It acts as the first line of defense between your systems and the wild internet. Two of the most … Read more

How to Install pgAdmin Web as a Docker Container with NGINX, SSL, and Domain Setup

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This tutorial provides a comprehensive guide for setting up pgAdmin Web with Docker, NGINX, and Let’s Encrypt SSL. Here’s a summary of the steps involved: Prerequisites ✅ A server (Ubuntu 20.04+ recommended) with Docker installed. Root or sudo access. A registered domain name pointed to your server’s public IP. Basic knowledge of terminal commands. Ports … Read more

How to Deploy Metabase on DigitalOcean with Docker, PostgreSQL, NGINX, and SSL

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Looking for a powerful yet easy-to-use business intelligence tool you can host yourself? This step-by-step guide will walk you through installing and securing Metabase on a DigitalOcean Droplet using Docker, connected to a managed PostgreSQL database. You’ll also learn how to use your custom domain, set up free HTTPS with Certbot, and keep Metabase up … Read more

How to Set Up Zabbix Monitoring on DigitalOcean with Docker and SSL

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Zabbix Zabbix is a robust open-source monitoring platform that helps organizations track server performance, application health, and network infrastructure in real-time. This tutorial will guide you step-by-step through the process of installing and configuring Zabbix on a DigitalOcean Droplet running Ubuntu 24.04 LTS, using Docker containers, a PostgreSQL database, NGINX as a reverse proxy, and … Read more

Reviewing Zabbix in 2025: The Comprehensive Monitoring Tool

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Zabbix is a widely-used open-source monitoring tool, renowned for its flexibility, scalability, and powerful features. As we move into 2025, the question arises: Is Zabbix still relevant in today’s fast-paced IT environments? In this review, we’ll dive deep into its capabilities, compare it with competitors, and evaluate its performance for businesses of all sizes. What … Read more

Unlocking Secure Remote Work with Kasm Workspaces

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Kasm Workspaces is an open-source platform that delivers browser-based, containerized environments for virtual desktops, web browsers, and applications. Imagine accessing secure, virtualized workspaces directly from your browser, streaming apps without the need for heavy software installations or complex infrastructure. Unlike traditional Virtual Desktop Infrastructure (VDI) solutions, Kasm Workspaces offers a more flexible, scalable, and inherently … Read more

How to Convert .mbox to .eml Files for Microsoft Outlook Using Thunderbird

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When you export emails from Gmail or Google Workspace using Google Takeout, your entire mailbox is archived as a .mbox file. While excellent for bulk archiving, this format presents challenges when you need to access individual emails in applications like Microsoft Outlook or share them selectively. This comprehensive guide will walk you through the process … Read more

How to Bypass Google Workspace Login Challenge: A Step-by-Step Guide for Admins

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Learn how to effectively bypass the frustrating “We want to make sure that it’s really you trying to complete this action” message in Google Workspace. This comprehensive, step-by-step guide for administrators walks you through the exact fix using the Google Admin Console, empowering you to regain access quickly and efficiently. Why This Security Prompt Appears … Read more