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Virtualization tutorial - IT technology blog

Effortless KVM Management with Cockpit-machines: Say Goodbye to Bulky Virt-manager

By admin May 14, 2026

Forget Virt-manager—Cockpit-machines is the ultimate solution for managing KVM on Linux servers. Featuring a smooth web interface, it installs in 5 minutes and is extremely RAM-efficient.

Security

Stop “Sneaky” Connections on Linux with OpenSnitch: A Powerful Application-Level Firewall

By admin May 14, 2026

Don't let apps leak your data without permission. Learn how to use OpenSnitch to control every network connection on Linux and protect your privacy.

Fedora

DNF History: The ‘Time Machine’ for Risk-Free Fedora System Tweaking

By admin May 14, 2026

Fedora system issues after an update? Don't worry, dnf history lets you rollback, undo, and manage your software installation history safely and quickly.

VMware

RBAC on VMware vCenter: Don’t Let Junior Admins Hold the “Life and Death” Power

By admin May 14, 2026

RBAC permission management on vCenter is a vital skill for protecting virtualized systems. This article shares how to set up Roles and Permissions based on real-world experience managing an 8-host cluster.

Artificial Intelligence tutorial - IT technology blog

Bringing Claude Code to CI/CD: Hands-Free Code Reviews and Automated Testing

By admin May 14, 2026

A guide to integrating Claude Code into CI/CD to automate code reviews, security audits, and unit tests. Save hours of coding and effectively optimize API costs.

Security

SPF, DKIM, and DMARC: The ‘Atomic Trio’ for 100% Email Inbox Delivery

By admin May 14, 2026

Don't let your emails disappear into the Spam folder. Here is a detailed guide on configuring SPF, DKIM, and DMARC to secure your domain and enhance sender reputation for IT pros.

Monitoring

24/7 Internet Bandwidth Monitoring: Holding Your ISP Accountable with Prometheus and Grafana

By admin May 14, 2026

On a 300Mbps plan but still lagging? Here is a detailed guide on using Speedtest Exporter, Prometheus, and Grafana for 24/7 monitoring, with real-world tips for handling alert fatigue.

AI Agent for Server Log Monitoring: From On-call Nightmares to Smart Telegram Alerts

By admin May 14, 2026

Turn GBs of log files into focused Telegram alerts with an AI Agent. Learn how to use Python and Gemini API to filter noise, analyze server errors, and suggest instant fixes.

Security

Teleport: How I Managed 50+ Servers and K8s Without Using a Single SSH Key

By admin May 14, 2026

Managing SSH keys for dozens of servers is a significant security challenge. This article shares practical experience in deploying Teleport—an SSH alternative using short-lived certificates to centralize Server and Kubernetes management with detailed audit logs.

Linux

Mastering lsof on Linux: Pro Tips for Finding Processes Occupying Ports and Fixing ‘Too Many Open Files’ Errors

By admin May 14, 2026

Linux users shouldn't miss out on lsof for monitoring file descriptors and fixing 'Too many open files' errors. Check out 5 real-world troubleshooting tips from a system expert.