How to install Virtualbox Extension Pack from the command line (Bash) on Ubuntu 15.10 wily

From: forums.virtualbox.org/vi…

#!/bin/bash
version=$(vboxmanage -v)
echo $version
var1=$(echo $version | cut -d ‘r’ -f 1)
echo $var1
var2=$(echo $version | cut -d ‘r’ -f 2)
echo $var2
file=”Oracle_VM_VirtualBox_Extension_Pack-$var1-$var2.vbox-extpack”
echo $file
wget download.virtualbox.org/… -O /tmp/$file
#sudo VBoxManage extpack uninstall “Oracle VM VirtualBox Extension Pack”
sudo VBoxManage extpack install /tmp/$file –replace