Posted inFedora
Professional Rust Installation on Fedora: Don’t Use DNF, Use Rustup!
Stop using DNF to install Rust on Fedora! Follow this guide to set up a professional environment with Rustup, Cargo, and VS Code for maximum performance.
Posted inMonitoring
Monitoring Distributed Applications with OpenTelemetry and Jaeger: Finding Performance Bottlenecks Through Distributed Traces
Prometheus can tell you your system is slow, but finding which service in a microservices chain is the actual bottleneck requires distributed tracing. This guide walks through setting up OpenTelemetry and Jaeger, instrumenting a Python application, and reading traces to diagnose performance issues — based on real-world experience.
Posted inDevelopment
Playwright E2E Testing: A Professional Guide to End-to-End Testing for Web Applications
Playwright is a modern E2E testing tool from Microsoft with support for Chromium, Firefox, and WebKit, offering an intuitive API and a powerful Trace Viewer. This guide walks through installation, configuration, writing tests with the Page Object Model, and integrating with CI/CD via GitHub Actions.
Posted inAI
Sub-agents in Claude Code: Delegating Work to Specialized Agents
Sub-agents in Claude Code let you break complex tasks into multiple specialized agents running in parallel, each with its own isolated context. This guide covers how to configure them, pass context between agents, and monitor output to ensure accuracy.
Posted inCentos
How to Install and Configure a Secure FTP Server with vsftpd on CentOS Stream 9: SSL/TLS and Virtual Users
A guide to installing vsftpd on CentOS Stream 9 with SSL/TLS (FTPS) and virtual users — completely isolating FTP accounts from system accounts. Includes detailed PAM, firewalld, and SELinux configuration based on real deployment experience.
Posted inUbuntu
Install and Configure AdGuard Home on Ubuntu to Block Ads and Secure DNS for Your Entire Local Network
AdGuard Home is a DNS sinkhole you install on Ubuntu to block ads and tracking for every device on your LAN — including Smart TVs and IoT devices. This guide walks through each step: freeing port 53, installing the binary, configuring upstream DoH, adding blocklists, and pointing your router's DNS to AdGuard Home.
Posted inNetwork
Headscale: Self-Host Your Own Tailscale Mesh VPN Control Plane
Headscale is an open-source implementation of the Tailscale control plane that lets you self-host your entire mesh VPN management infrastructure on your own server. This guide shares hands-on experience from six months of running it in production with ~30 nodes, covering installation, configuration, and debugging NAT traversal issues.
Posted inAI
Build Your Own Image Generation API with Stable Diffusion and FastAPI: Mastering AI on Linux Servers
Learn how to build your own text-to-image AI system using Stable Diffusion and FastAPI on a Linux server. This practical guide focuses on cost savings and GPU optimization.
Posted inVMware
Mastering VMware vSphere Logs: Troubleshooting Systems with vmware.log, hostd.log, and vpxd.log
Learn to master log analysis in VMware vSphere. This guide shows you how to use Linux commands to inspect vmware.log, hostd.log, and vpxd.log to troubleshoot virtualization issues like a pro.
Posted inDocker
Dockerizing Python with Poetry: A Smooth Solution for Dependencies and Build Speed
Forget Pip! Here's how to Dockerize Python apps using Poetry to slash image sizes by 80% and achieve lightning-fast builds with Layer Caching.