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How to install KVM, QEMU and libvirt on Linux

To install KVM on Ubuntu or Debian, you need to prepare the system with the required packages, verify hardware virtualization support, and authorize users to run virtual machines. Below are the steps to install KVM on Ubuntu 24.04 (Noble Numbat) or recent Debian releases. Step 1: Update the system Before installing KVM, update your package repository information: sudo apt update Step 2: Check virtualization support 2.1 Verify CPU compatibility Check if your CPU supports hardware virtualization:

Monday, October 13, 2025 | 2 minutes Read
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How to validate the KVM host installation

Before creating and running virtual machines with KVM, it’s essential to validate that the host meets the required hardware and software capabilities to ensure optimal performance. This guide describes how to verify system capabilities using tools such as virt-host-validate and virsh. 1. Validating CPU virtualization support KVM requires processors with hardware virtualization extensions: Intel: VT-x AMD: AMD-V To check if your CPU is compatible, run: grep --color -Ew 'svm|vmx|lm' /proc/cpuinfo vmx → Intel CPU with VT-x svm → AMD CPU with AMD-V lm → 64-bit support If your CPU lacks these extensions, only CPU emulation will be available and performance will be significantly reduced.

Monday, October 13, 2025 | 2 minutes Read