The following lines were added (+) and removed (-):
deb http://download.virtualbox.org/virtualbox/debian trusty contrib <nowiki>deb http://download.virtualbox.org/virtualbox/debian trusty contrib</nowiki> wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add - <nowiki>wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -</nowiki>