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Building a Professional Network Lab with GNS3 on Ubuntu: Maximum Performance, Real-world Experience

By admin May 10, 2026

Don't let Windows VMs slow down your networking studies. Learn how to install GNS3 directly on Ubuntu, optimizing KVM and Docker for a high-performance professional network lab.

Virtualization

Memory Ballooning and KSM on KVM/Proxmox: Optimize RAM to Run More Virtual Machines

By admin May 1, 2026

Memory Ballooning and KSM (Kernel Same-page Merging) are two RAM optimization techniques that let you run more VMs on the same hardware without upgrading your server. This guide covers practical configuration on KVM/Proxmox with a real-world comparison of the trade-offs for each approach.

Virtualization

USB Passthrough on KVM and Proxmox: Connecting Security Dongles, Cameras, and 3G Modems to Virtual Machines

By admin May 1, 2026

A guide to configuring USB Passthrough on KVM and Proxmox to pass security dongles, 3G modems, and USB cameras directly into virtual machines. Covers virsh XML configuration, Proxmox Web UI, permission error handling, and an auto-attach script.

Virtualization

Customizing Linux Cloud Images with virt-customize: Fast, Efficient, No VM Boot Required

By admin April 29, 2026

Forget manual configuration. Use virt-customize to inject SSH keys, install packages, and customize Linux Cloud Images in just 60 seconds without booting the VM.

Virtualization

Installing Windows 11 on KVM/Proxmox: The Best Way to Emulate TPM 2.0 and Secure Boot

By admin April 20, 2026

Installing Windows 11 on Proxmox/KVM often fails due to hardware incompatibility. Learn how to emulate TPM 2.0 and Secure Boot for a proper setup with full updates.

Virtualization

Deploying oVirt: An Enterprise KVM Management Solution to Replace VMware vSphere

By admin April 19, 2026

A detailed guide on deploying oVirt 4.5 as a VMware vSphere alternative for enterprises. Real-world insights on installing Hosted Engine and configuring Storage and Network on KVM.

Virtualization

SPICE Protocol: The Ultimate Secret for Remote KVM Access as Smooth as a Physical Machine

By admin April 14, 2026

Configure SPICE Protocol for KVM to reduce screen latency, support two-way audio, and enable smooth USB Passthrough. Detailed guide for Proxmox and Ubuntu Server.

Virtualization

Optimizing KVM/Proxmox Resources: Stop VMs from Draining Your Hardware

By admin April 9, 2026

Managing KVM/Proxmox resources effectively is easy when you know how. Guide on optimizing CPU Type, configuring VirtIO SCSI, and RAM Ballooning tips to prevent bottlenecks.

Virtualization

Configuring SR-IOV on Linux: How to Unlock Maximum Bandwidth for KVM Virtual Machines

By admin March 31, 2026

Is your KVM virtual machine experiencing slow network speeds? Discover how to configure SR-IOV to maximize throughput, reduce host CPU load, and eliminate latency.

Virtualization

Converting Virtual Machine Disk Formats with qemu-img: VMDK, QCOW2, VDI, and VHD

By admin March 25, 2026

This article provides a detailed guide on using the `qemu-img` tool to convert common virtual machine disk formats such as VMDK, QCOW2, VDI, and VHD. It covers preparation steps, basic command syntax, and practical use cases, helping newcomers easily migrate and manage VMs.