If you get the USB device is busy with a previous request error when you attach a USB device on VirtualBox, see this post for resolution.

Jack Wallen experienced several errors upon installing VirtualBox 7.0 and he has the fixes for them.

VirtualBox makes virtual installations of Windows and other operating systems easier than you'd think in Linux (as mentioned in our second look at Ubuntu 8.04, "Hardy Heron"), but the key missing ...

My problem was that VirtualBox wasn't recognising my USB ports, and Ubuntu1501 came to the rescue with an elegant, short and useful tutorial. Thank you again :) Next up, I'm using Partimage (which ...