How install last version of Virtualbox on Ubuntu 16.04

1- Add Virtualbox Oracle repository 

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" >> /etc/apt/sources.list.d/virtualbox.list' 

2- Add The Oracle public key  :


wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -

wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

3- update the repos and install virtualbox


sudo apt-get update

sudo apt-get install virtualbox-5.1
 

 4- Add VirtualBox User(s) to vboxusers Group

sudo usermod -a -G vboxusers username


 5- Start virtualbox : VirtualBox


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