After the installation of VirtualBox, you can open the virtual machine, but found that the default is not full screen to play the virtual machine, so this time you need to install VirtualBox enhanced plug-in to support.
I installed a Windows 7 virtual machine under Ubuntu for a rainy-out. With the menu in VirtualBox, you can install the enhanced plugin automatically.
The download is automatically loaded into the virtual CD drive, but I have restarted the virtual machine more than once and cannot have it installed on the image file.
This time, I found the downloaded image file is not mounted, so I first found the file address, first to mount it.
$ sudo mount./.config/virtualbox/vboxguestadditions_4.3.10.iso/media/kevin/
After the mount is complete, restart the VirtualBox.
Open the Windows 7 virtual machine, and at this point you can follow the prompts to install the enhanced plug-in to enable the virtual machine to adapt to screen display.
This virtual opportunity error occurs when a general user opens. can only
$ sudo virtualbox
The highest privilege is opened.
Under Ubuntu 14, install the VirtualBox enhanced plugin