What is VirtualBox? A Complete Guide to Virtualization

Introduction to VirtualBox

In the ever-evolving world of technology, creating and managing virtual environments has become a crucial skill for IT professionals.

This is where VirtualBox comes into play. As an open-source virtualization product, it has become a go-to tool for many tech enthusiasts and professionals. But what exactly is VirtualBox, and why is it so crucial in today’s computing world?

Let’s dive in and explore.

Virtualization: A Modern Computing Necessity


In the past, if you wanted to run multiple operating systems or different versions of the same operating system, you would need multiple physical machines.

This was not only costly but also inefficient and space-consuming. However, this is no longer the case with the advent of virtualization.

Virtualization allows you to create multiple virtual machines (VMs) on a single physical device. Each VM operates as a separate computer with its own operating system and applications.

This means you can run Windows on a Mac, Linux on a Windows machine, or even multiple instances of the same operating system on one computer.

The benefits of virtualization are numerous. It allows for better resource utilization, as you can run multiple VMs on a single physical machine.

It also provides a safe environment for testing new software or operating systems, as any changes or issues are confined to the VM and do not affect the host machine.

What is VirtualBox?

What is VirtualBox

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise and home use. Developed by Oracle Corporation, it’s a type-2 hypervisor that allows you to create and manage VMs on your computer.

A type-2 hypervisor, also known as a hosted hypervisor, runs on the host operating system of the physical machine.

This contrasts with a type-1 hypervisor running directly on the host machine’s hardware. Because VirtualBox is a type-2 hypervisor, it’s easy to install and use, even for those new to virtualization.

The Evolution of VirtualBox

InnoTek Systemberatung GmbH, a German software company, initially created VirtualBox. 2008 Sun Microsystems acquired Innotek, and VirtualBox became part of Sun’s software portfolio.

Oracle Corporation acquired Sun Microsystems in 2010, and since then, VirtualBox has been developed and maintained by Oracle.

Over the years, VirtualBox has undergone continuous development and refinement to meet the evolving needs of users. It has grown from a simple virtualization tool to a comprehensive solution that supports a wide range of operating systems and features.

How Does VirtualBox Work?

The Virtualization Process

VirtualBox creates a virtual environment on your computer where you can install and run a guest operating system. Like any other application, the guest operating system runs in a separate window on your host machine.

When you create a VM in VirtualBox, you allocate a portion of your physical machine’s resources (such as CPU, RAM, and storage) to the VM.

The guest operating system sees these resources as its own and operates independently of the host operating system.

For example, let’s say you have a Mac and you want to run a Windows application. You can use VirtualBox to create a Windows VM on your Mac.

Once the VM is set up, you can install and run the Windows application in the VM while still using your Mac as usual.

VirtualBox as a VM Manager

VirtualBox as a VM Manager

One of the critical roles of VirtualBox is managing VMs. With VirtualBox, you can create, modify, start, pause, and stop VMs.

You can also save the state of a VM, which is like taking a snapshot of the VM at a particular time. This is useful to revert the VM to a previous state.

VirtualBox also allows you to configure the settings of a VM, such as the amount of RAM and storage allocated to the VM, the type of network connection, and the hardware devices available to the VM.

You can even enable shared folders between the host machine and the VM, making it easy to transfer files.

The Power of VirtualBox

The Power of VirtualBox

VirtualBox is not just a tool for running different operating systems on your computer. It’s a robust platform that can be used for various purposes.

Software Testing and Development

With VirtualBox, you can create a separate environment for testing new software or developing applications.

This allows you to try and debug your applications in a controlled domain without affecting your primary operating system. If something goes wrong, you can simply revert the VM to a previous state or delete it and start over.

Learning and Education

VirtualBox is an excellent tool for learning about different operating systems.

Whether you are a computer science student or an IT professional looking to expand your skills, VirtualBox allows you to explore and experiment with various operating systems without needing multiple physical machines.

Legacy Software Support

If you have old software that only runs on a specific version of an operating system, you can use VirtualBox to create a VM with that operating system.

This allows you to continue using the software on your current machine without maintaining an old physical machine.

Key Features and Uses of VirtualBox

As an IT professional, I’ve had the opportunity to work with various virtualization tools. Among them, VirtualBox stands out due to its powerful features and versatility.

Let’s delve into some of the critical elements that make VirtualBox a powerful virtualization tool:

  1. Broad Operating System Support: VirtualBox supports various host and guest operating systems. Whether you’re running Windows, macOS, Linux, or Solaris on your physical machine, you can use VirtualBox to create VMs with almost any operating system.
  2. Easy VM Management: VirtualBox provides a user-friendly interface for managing VMs. You can easily create, start, stop, and delete VMs. You can also adjust the settings of a VM, such as the amount of RAM and storage allocated to it.
  3. Snapshot Feature: VirtualBox allows you to take snapshots of a VM anytime. This is incredibly useful when testing new software or configurations, as you can quickly revert the VM to a previous state if something goes wrong.
  4. Shared Folders: With VirtualBox, you can create folders between the host machine and the VM. This makes it easy to transfer files between the two.
  5. Seamless Mode: This feature allows you to run applications from the guest operating system on the host system’s desktop. It’s as if the application was running natively on the host machine.

Scenarios Where VirtualBox Can Be Utilized

VirtualBox can be utilized in a variety of scenarios, including:

  • Software Testing: VirtualBox provides a safe environment for testing new software or configurations. If something goes wrong, it won’t affect the host machine.
  • Learning and Education: Whether you’re a computer science student or an IT professional looking to expand your skills, VirtualBox allows you to experiment with various operating systems and software without needing multiple physical machines.
  • Legacy Software Support: If you have old software that only runs on a specific version of an operating system, you can use VirtualBox to create a VM with that operating system.

Installation and Setup of VirtualBox

Installing VirtualBox is a straightforward process.

Here’s a step-by-step guide:

  1. Download VirtualBox: Visit the VirtualBox website ( and download the latest version of VirtualBox for your operating system.
  2. Install VirtualBox: Run the installer and follow the on-screen instructions. The default settings should be fine for most users.
  3. Create a New VM: After installing VirtualBox, open it and click “New” to create a new VM. You’ll need to specify the VM’s name, the operating system’s type and version, and the amount of RAM allocated to the VM.
  4. Install the Guest Operating System: Once the VM is created, you’ll need to install the guest operating system. Mount an ISO file or a physical installation disc to the VM.

Tips on Setting Up Your First Virtual Machine

Setting up your first VM can be daunting, but don’t worry; I’ve got you covered. Here are some tips to help you get started:

  • Allocate Enough RAM: Make sure to allocate enough RAM to the VM, but not too much that it affects the performance of the host machine. A good rule of thumb is to allocate no more than half of your physical RAM to the VM.
  • Install Guest Additions: After installing the guest operating system, install VirtualBox Guest Additions. This is a set of drivers and software applications that improve the performance and usability of the VM.
  • Use Snapshots: Don’t forget to use the snapshot feature. If something goes wrong, it can save you time and hassle.

Comparing VirtualBox with Other Virtualization Tools

Comparing VirtualBox with Other Virtualization Tools

In the virtualization world, several tools are available, each with its own strengths and weaknesses.

One of the most common comparisons is between VirtualBox and VMware, another popular virtualization tool.

  • Ease of Use: VirtualBox and VMware are user-friendly, but VirtualBox is generally considered more straightforward to use, especially for beginners. Its interface is straightforward and intuitive, providing much flexibility regarding configuration.
  • Performance: VMware is often cited as having better performance, especially regarding graphics and 3D support. However, VirtualBox has significantly improved in recent years and provides more than adequate performance for most use cases.
  • Price: VirtualBox is free for personal and educational use, while VMware has free and paid versions. The paid version of VMware offers additional features and support, but for most users, VirtualBox provides all the necessary parts at no cost. Virtualbox also requires a license, depending on how you use it.
  • Community Support: Both VirtualBox and VMware have large and active communities. However, because VirtualBox is open-source, it tends to have a more vibrant community, which can be a valuable resource when you need help or advice.


What is a VirtualBox used for?

VirtualBox is a versatile software that enables the extension of a single computer to run multiple operating systems concurrently. This includes operating systems like Microsoft Windows, Mac OS X, Linux, and Oracle Solaris. It’s a practical solution for running software written for one operating system on another, providing a diverse and flexible computing environment. Is

Is VirtualBox completely free?

While VirtualBox itself is free to use and is distributed under an open-source license, the VirtualBox Extension Pack is licensed under the VirtualBox Personal Use and Evaluation License (PUEL). For personal use, it’s free, but commercial users are required to purchase a license.

What are the disadvantages of using VirtualBox?

VirtualBox relies heavily on the host computer’s hardware. If the host machine has any flaws, it can affect the performance of the VirtualBox. Moreover, if multiple virtual machines run on a single operating system and the system encounters an issue, all the virtual machines could be affected.

What is the difference between VirtualBox and VMware?

VirtualBox is a free and open-source hypervisor, while VMware is a commercial product offering various virtualization software and applications. One key difference is that VirtualBox supports software virtualization, while VMware does not. Software virtualization emulates a complete computer system and runs guests on top of it. Additionally, VirtualBox supports a variety of virtual disc types, while VMware primarily supports the VMDK format.


In the ever-evolving world of technology, virtualization has become a necessity. Whether you’re an IT professional, a developer, a student, or a tech enthusiast, having a tool like VirtualBox in your arsenal can open up a world of possibilities.

From its broad operating system support and easy VM management to its powerful features like snapshots and shared folders, VirtualBox offers a comprehensive solution for your virtualization needs.

And with its active community and continuous development, you can be sure that VirtualBox will continue to evolve and improve.


  • Fredrik Filipsson

    Fredrik Filipsson brings two decades of Oracle license management experience, including a nine-year tenure at Oracle and 11 years in Oracle license consulting. His expertise extends across leading IT corporations like IBM, enriching his profile with a broad spectrum of software and cloud projects. Filipsson's proficiency encompasses IBM, SAP, Microsoft, and Salesforce platforms, alongside significant involvement in Microsoft Copilot and AI initiatives, enhancing organizational efficiency.