However, if you have over 1GB, about a quarter your RAM should be fine - For example, if you have 2GB of RAM, 512MB is fine to allocate, or if you have 4GB of RAM, 1GB is fine, but if you are not sure how much system RAM you have, just go with the default. If you have 1GB or less of RAM, it is advisable that you stick with the recommendation. VirtualBox will try to guess how much of your memory (or RAM) to allocate for the virtual machine. You should also specify that the operating system is Linux, and that the version is Ubuntu. You can call the machine whatever you want, but since you are installing Ubuntu, it makes sense to call it Ubuntu VM or something similar, especially if you have any other VM in use. You will now be presented with a screen where you can name your new VM and indicate which OS is going to be used. You should click on New to indicate that you want to create a new virtual machine, and when the New Virtual Machine Wizard appears, click Next button. Install your copy of Virtual box as you would any windows program and then run it. This article will show you how to set this up on any Windows PC using the Virtual Box virtualization console, which you can download for free from here, along with the Linux Ubuntu OS (version 14.04.2 LTS) which you can get from here. Note that if you have a Windows 8 PC, you may be able to use the Hyper-V virtualization console instead (see Set Up An Ubuntu Virtual Machine Using Hyper V). For using the Linux (Ubuntu) target module, you may wish to use a virtual machine if you do not have access to a separate computer that runs the desired OS or do not wish to dual boot your development PC.

How to set up ubuntu virtualbox