This guide will walk you through steps on how to setup a VirtualBox shared folder inside your Ubuntu Server guest. Tested on Ubuntu Server 16.04.3 LTS (Xenial Xerus)
- Open VirtualBox
- Right-click your VM, then click Settings
- Go to Shared Folders section
- Add a new shared folder
- On Add Share prompt, select the Folder Path in your host that you want to be accessible inside your VM.