If you have recently installed Ubuntu 14.04 Trusty Tahr on Oracle VM VirtualBox Manager, you may notice that your screen isn’t re-sizing and you are unable to copy and paste into the terminal even after you had set both ‘Shared Clipboard’ and ‘Dran’n’Drop’ to Bidirectional. You need to install the VirtulaBox Guest Additions to resolve this. Below is recommended steps to accomplish that: Install Steps – Install DKMS (Dynamic Kernel Module Support) Package
In order to have proper mouse and screen integration as well as folder sharing with your host system, you will need to install the VirtualBox Guest additions. Follow the steps outline below to complete this task: Steps: – Open a terminal console, and run following command apt-get update && apt-get install -y linux-headers-$(uname -r) – Mount the Guest Additions CD image and click Cancel on prompt – From the terminal console, run following commands to copy the “VBoxLinuxAdditions.