The QEMU system emulation command utilizes the qemu-system-x86_64 emulator to create a virtual x86_64 system with various hardware components, including a graphics card, network interfaces, storage devices, and USB controllers. The command enables acceleration and allocates 3 GB of RAM to the emulated system.

Cell 2

qemu-system-x86_64 -monitor stdio \
    -device ati-vga \
    -enable-kvm -accel hvf \
    -smp 2 \
    -m 3G \
    -netdev tap,ifname=tap0,br=bridge1,script=no,downscript=no,id=n1 \
    -device rtl8139,netdev=n1 \
    -drive if=ide,index=1,media=cdrom,file="" \
    -drive file="./VirtualBox VMs/Ubuntu/Ubuntu.vmdk",if=none,id=ubuntuhdd \
    -device virtio-blk-pci,drive=ubuntuhdd,bus=pci.0,bootindex=2 \
    -device piix3-usb-uhci \
    -drive id=freeagent,file=/dev/disk2,if=none,format=raw \
    -device usb-storage,drive=freeagent

#!/bin/bash

# Define VM settings
VMMODE="qemu-system-x86_64"
MONITOR="stdio"
GPU="ati-vga"
QEMU_ACCEL="hvf"
VCPUS="2"
MEM="3G"
NETWORK_DEV="tap"
NETWORK_IFNAME="tap0"
NETWORK_BRIDGE="bridge1"
NETWORK_SCRIPT="no"
NETWORK_DOWN_SCRIPT="no"
NETWORK_ID="n1"
NIC_MODEL="rtl8139"

# Define disk settings
CDROM_MEDIA="cdrom"
CDROM_FILE=""
DISK_ID="ubuntuhdd"
DISK_FILE="/path/to/Ubuntu.vmdk"
DISK_IF="none"
DISK_FORMAT="raw"
BOOT_INDEX="2"

# Define USB settings
USB_DEV="piix3-usb-uhci"
USB_HDD_ID="freeagent"
USB_HDD_FILE="/dev/disk2"
USB_HDD_IF="none"

# Define qemu command options
qemu_opts=(
  "-monitor ${MONITOR}"
  "-device ${GPU}"
  "-enable-kvm"
  "-accel ${QEMU_ACCEL}"
  "-smp ${VCPUS}"
  "-m ${MEM}"
  "-netdev ${NETWORK_DEV},ifname=${NETWORK_IFNAME},br=${NETWORK_BRIDGE},script=${NETWORK_SCRIPT},downscript=${NETWORK_DOWN_SCRIPT},id=${NETWORK_ID}"
  "-device ${NIC_MODEL},netdev=${NETWORK_ID}"
  "-drive if=ide,index=1,media=${CDROM_MEDIA},file=${CDROM_FILE}"
  "-drive file=${DISK_FILE},if=${DISK_IF},id=${DISK_ID}"
  "-device virtio-blk-pci,drive=${DISK_ID},bus=pci.0,bootindex=${BOOT_INDEX}"
  "-device ${USB_DEV}"
  "-drive id=${USB_HDD_ID},file=${USB_HDD_FILE},if=${USB_HDD_IF},format=${DISK_FORMAT}"
  "-device usb-storage,drive=${USB_HDD_ID}"
)

# Create qemu command
qemu_cmd="${VMMODE} ${qemu_opts[@]}"

# Print qemu command
echo "${qemu_cmd}"

QEMU System Emulation Command

Overview

This command utilizes QEMU to emulate an x86_64 system.

Command Breakdown

• qemu-system-x86_64: Starts the x86_64 QEMU emulator.
• -monitor stdio: Establishes a standard input/output monitor for the emulator.
• -device ati-vga: Specifies the ATI VGA graphics card for the emulated system.
• -enable-kvm: Enables KVM (Kernel-based Virtual Machine) acceleration.
• -accel hvf: Enables HVF (Hardware Virtualization Framework) acceleration.
• -smp 2: Sets the number of CPU threads to 2.
• -m 3G: Allocates 3 GB of RAM to the emulated system.
• -netdev tap,ifname=tap0,br=bridge1,script=no,downscript=no,id=n1: Creates a tap device for networking.
• -device rtl8139,netdev=n1: Specifies the RTL8139 network card with the tap device.
• -drive if=ide,index=1,media=cdrom,file="": Specifies an empty CDROM drive.
• -drive file="./VirtualBox VMs/Ubuntu/Ubuntu.vmdk",if=none,id=ubuntuhdd: Specifies a VMDK file for the Ubuntu system.
• -device virtio-blk-pci,drive=ubuntuhdd,bus=pci.0,bootindex=2: Specifies the virtio block device for the Ubuntu system.
• -device piix3-usb-uhci: Specifies the PIIX3 USB UHCI controller.
• -drive id=freeagent,file=/dev/disk2,if=none,format=raw: Specifies the raw disk file for the FreeAgent system.
• -device usb-storage,drive=freeagent: Specifies the USB storage device for the FreeAgent system.