Right after BackBox Linux installation in VirtualBox, please click on Devices – Insert Guest Additions CD image
…then login to BackBox Linux over ssh and run next commands
# Install dkms sudo apt-get install dkms # Find Guest Addition cd point sudo blkid
In our case it’s under /dev/sr0
# Mount CD on some temp folder sudo mkdir /tmp/DVD sudo mount /dev/sr0 /tmp/DVD cd /tmp/DVD # Run Installation sudo ./VBoxLinuxAdditions.run
After installation just reboot machine and that would be that.