Virtualization

QEMU Disk Image and VM Management Guide Introduction QEMU is a powerful open-source emulator and virtualizer for running virtual machines (VMs) and managing disk images on Linux systems. It supports a wide range of architectures and provides tools for creating, manipulating, and running VMs with flexible configurations. This guide covers essential QEMU commands for disk image management and VM operations, with practical examples for system administrators and developers. Prerequisites QEMU installed on a Linux system (qemu-system-x86_64 --version to verify). Root or sudo privileges for certain operations (e.g., installing QEMU or accessing KVM). Basic understanding of Linux terminal commands and virtualization concepts. Install QEMU on Ubuntu/Debian: ...

💊 Quick Pill: QEMU/VirtualBox Disk Resize ℹ️Info Use case: Expand virtual machine disk when running out of space. Works with QEMU raw images, VirtualBox VDI/VHD, and similar formats. 🚀 Complete Resize Process ⚠️Warning ⚠️ Critical: Always backup your VM disk before resizing! Step-by-Step Guide # 1. Shutdown your VM first! # 2. Resize the disk image file qemu-img resize -f raw Ubuntu.vhd 200G # 3. Load NBD kernel module sudo modprobe nbd # 4. Connect disk as network block device sudo qemu-nbd --connect=/dev/nbd0 -f raw Ubuntu.vhd # 5. Expand the partition sudo parted /dev/nbd0 Inside parted: ...