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Saving VMs from RAM Shortages: How to Configure SSD Host Cache on VMware ESXi

By IT From Zero August 14, 2026

Is your VM lagging due to a lack of RAM? Discover how to configure SSD Host Cache on VMware ESXi to speed up Swapping and keep your system running smoothly even when resources are low.

Database

Real-time PostgreSQL Monitoring with pg_activity: Kill Hung Queries in a Flash

By IT From Zero August 14, 2026

Don't let slow queries crash your server. Learn how to use pg_activity on Linux for real-time PostgreSQL monitoring, detecting idle in transactions, and handling hung queries quickly.

Artificial Intelligence tutorial - IT technology blog

Automating LLM-as-a-Judge with GitHub Actions: Stopping AI Errors Before Deployment

By IT From Zero August 13, 2026

Don't let your AI application hallucinate in production. Learn how to implement an automated LLM-as-a-Judge workflow with GitHub Actions for effective AI quality control.

Network

Termshark: Wireshark-style Packet Analysis Directly on the Linux Terminal

By IT From Zero August 13, 2026

Forget about downloading pcap files. With Termshark, you can analyze packets with a Wireshark-like interface directly on your Linux Terminal via SSH.

Virtualization

Proxmox SDN & EVPN: The Ultimate Trick to Extend Layer 2 Networks Across Datacenters

By IT From Zero August 13, 2026

A detailed guide on configuring Proxmox SDN with EVPN to extend Layer 2 networks across datacenters. Keep VM IPs consistent across sites without expensive hardware.

Centos

Rescuing CentOS Stream 9: Using Rescue Mode and Chroot to Fix GRUB Errors

By IT From Zero August 13, 2026

CentOS Stream 9 server won't boot? Don't worry. This guide will help you use Rescue Mode and Chroot to fix GRUB errors and restore your system in just a few steps.

Building MCP Servers at Warp Speed with FastMCP: Connecting AI to Internal Data using Python

By IT From Zero August 13, 2026

Forget about tedious boilerplate code. FastMCP helps you build Python-based MCP Servers lightning-fast, connecting AI to internal data in just minutes.

Security

Guide to Installing DefectDojo on Docker: Centralized Vulnerability Management for DevSecOps

By IT From Zero August 13, 2026

Vulnerability management is no longer a headache with DefectDojo on Docker. Detailed guide on installation, importing scan results, and API automation for DevSecOps.

VMware

Mastering ESXi Firewall with esxcli: From Manual Administration to Automation

By IT From Zero August 13, 2026

Managing ESXi Firewall via GUI is slow and error-prone. Learn to use esxcli to open ports, block IPs, and professionally automate VMware host security.

Python

Build Your Own Server Monitoring System with Python and Discord Webhook

By IT From Zero August 13, 2026

Don't wait for your server to crash to find out. Learn to write a Python script to monitor CPU, RAM, and Disk with Discord alerts in just 15 minutes.

Monitoring Argo CD Application Sync and Health Status with Prometheus and Grafana

Installing and Using Portkey AI Gateway: Rate Limiting, Load Balancing, and Multi-LLM Observability

How to Install and Configure nftables on Linux: A Complete iptables Replacement

Optimizing KVM Networking with virtio-net Multiqueue and vhost-net: Hitting Full 10GbE Without CPU Bottlenecks

How to Deploy Umami Analytics with Docker Compose and PostgreSQL: Self-Host a Lightweight GA4 Alternative

How to Back Up SQLite to S3 with Litestream: Real-Time Production Backups

Guide to Using Tart on macOS Apple Silicon: Create and Manage CLI Virtual Machines for CI/CD

Installing and Configuring Auditd on Ubuntu Server: Tracing User Actions Down to the Kernel Level

How to Use git-credential-oauth: Log in to GitHub and GitLab in Terminal via Browser

How to Enable Virtualization-Based Security (VBS) and Credential Guard on VMware vSphere

Saving VMs from RAM Shortages: How to Configure SSD Host Cache on VMware ESXi

Real-time PostgreSQL Monitoring with pg_activity: Kill Hung Queries in a Flash

Automating LLM-as-a-Judge with GitHub Actions: Stopping AI Errors Before Deployment

Termshark: Wireshark-style Packet Analysis Directly on the Linux Terminal

Proxmox SDN & EVPN: The Ultimate Trick to Extend Layer 2 Networks Across Datacenters

Rescuing CentOS Stream 9: Using Rescue Mode and Chroot to Fix GRUB Errors

Building MCP Servers at Warp Speed with FastMCP: Connecting AI to Internal Data using Python

Guide to Installing DefectDojo on Docker: Centralized Vulnerability Management for DevSecOps

Mastering ESXi Firewall with esxcli: From Manual Administration to Automation

Build Your Own Server Monitoring System with Python and Discord Webhook