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Running the operating-systems VM on macOS

Prerequisites

Make sure qemu is installed on your system:

brew install qemu

Running the VM

First, download the so-ubuntu-20-04.img image from here. This may take some time (total size of the image is around 8.8GB).

Then, use the qemu_run.sh script to run the VM:

sudo ./qemu_run.sh <path_to_vm_image> <number_of_cores> <number_of_GB_for_the_VM_RAM> <host_interface>

Here is the description of the mandatory arguments:

  • path_to_vm_image: path where you downloaded the so-ubuntu-20-04.img file.
  • number_of_cores: the number of cores you want the VM to use (we suggest at least 2 cores)
  • number_of_GB_for_the_VM_RAM: how many GB of RAM memory you want to have on your VM (we suggest at least 2GB)
  • host_interface: the host interface used to provide the VM with internet access

In order to find the value for host_interface, you can use the following command on your macOS host.

networksetup -listallhardwareports

The value of host_interface will be the device name of one of your Wi-Fi or ethernet ports, according to your type of connection. As an example, for a macOS host connected to Wi-Fi, we could get the following networksetup output:

Hardware Port: Ethernet Adapter (en6)
Device: en6
Ethernet Address: b6:e0:14:1e:65:8e

Hardware Port: Thunderbolt Bridge
Device: bridge0
Ethernet Address: 36:a1:9b:9f:e8:80

Hardware Port: Wi-Fi
Device: en0
Ethernet Address: bc:d0:74:ad:8a:b1

Therefore, we choose en0 as the value of the host_interface parameter.

Using the above recommendations, the command to start the VM will look like this:

sudo ./qemu_run.sh so-ubuntu-20-04.img 2 2 en0