Follow these simple steps to install Oracle VirtualBox on Ubuntu 16.04 & 18.04:
Step 1: Update Packages
$ sudo apt-get update
$ sudo apt-get upgrade
Step 2: Configure apt Repo
$ wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
$ wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
$ sudo add-apt-repository "deb http://download.virtualbox.org/virtualbox/debian `lsb_release -cs` contrib"
Step 3: Installation
$ sudo apt-get update
$ sudo apt-get install virtualbox-5.2
Step 4: Launch Virtual Box
$ virtualbox &
Great Job! You now have Oracle VirtualBox installed and ready to explore.
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