Ubuntu12.04 install VirtualBox

1. Edit sources using terminal commands. list1 sudo gedit/etc/apt/sources. list2. Add the software source www.2cto.com and add the following addresses to sources. at the end of list, save and Exit 1 deb http://download.virtualbox.org/virtualbox/debian precise contrib3, terminal command import public key, and update source www.2cto.com 1 wget-q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc-O-| sudo apt-key add-1 sudo apt-get update4, terminal command installation (4.1 is the latest version) 1 sudo apt-get install virtualbox-4.15, add current user to user group vboxusers to support usb. note: After the addition is complete, you must log out and log on again to apply for www.2cto.com 1 sudo usermod-a-G vboxusers. The current user name is Mr. over