virtualbox.org

Hi, I installed the virtualbox on my windows 7 about one year ago. Now I need to install this "valgrind" program by typing: sudo apt-get install valgrind on the terminal in Ubuntu. But it requires the user's password which I don't think I chose any password when I installed it. When I checked the user's account I see it's a 5-letter password. Any idea on how to retrieve the autoset password?

Thanks in advance guys

Way off-topic: not a VirtualBox question. Not even a question about a Windows Host. You should ask that in the Ubuntu forums.