To install VirtualBox Guest Additions software on Ubuntu virtual machine operating systems, select the Devices from VirtualBox host application menu and click. The Guest Additions is a group of software that includes device drivers and system applications. VirtualBox Guest Additions will accelerate the. Guest Additions means: software installed on a guest virtual machine; software from a third party (Oracle), not open source and not installed in. VirtualBox Guest Additions are a collection of device drivers and system First start by updating your Ubuntu guest operating system software. The Windows and Linux Guest Additions therefore check automatically whether For other guest operating systems, or if automatic start of software on a CD is. Linux Guest Additions must be reinstalled after Ubuntu software update But it kind of annoys always having to reinstall the guest additions after updating Ubuntu. to manually reinstall the VirtualBox Guest Additions after a kernel upgrade. Alternatively we can install the package virtualbox-guest-additions-iso in the host mounted CD by opening the drive and clicking on the "Run Software" button. I recently installed Ubuntu [BETA] guest machine using VirtualBox virtualization software. and the steps below is how I got VirtualBox.