Download the 64 bit Linux Virtualbox package from official website
The latest version at the time of writing this is 5.1.16
Now install the necessary packages
sudo eopkg it -c system.develsudo eopkg it linux-lts-headers
Install the downloaded package as follows
sudo sh ~/Downloads/VirtualBox-5.1.16-113841-Linux_amd64.run
Posted by: jittopjose
You need to download directly from official site.Fortunately an easy and well explained wiki page is available for installing Virtualbox.
Simple follow the instruction and your Virtualbox will be running in minutes.