virtualbox:
https://www.virtualbox.org/wiki/Downloads
ubentu:
http://www.ubuntu.org.cn/
http://www.ubuntu.com/download/desktop/thank-you?release=lts&bits=32&distro=desktop&status=zeroc
https://www.virtualbox.org/wiki/Downloads
http://www.ubuntu.org.cn/
http://www.ubuntu.com/download/desktop/thank-you?release=lts&bits=32&distro=desktop&status=zeroc