Install Virtual Box on Host Lubuntu / Ubuntu. Problems with USB Port and Installation of Guest Addition on Guest Account of Virtualbox

To install virtualbox on the Host Ubuntu, better not use the version from the repository, i.e. do NOT

sudo apt-get install virtualbox 

but rather download and install it from the Oracle virtualbox website. Otherwise the USB port is not working, (see stackoverflow). I also encountered problems to install the Guest Addition, when installing virtualbox from the repository.

Install musescore on Ubuntu Flavors (Lubuntu, Xubuntu, etc.)

To install musescore on ubuntu flavors, like lubuntu or xubuntu, it might be the easiest, to use wine to install it. The "normal" way by using the repository did not work for me on Lubuntu 12.04, that means it did not install the latest version 2.0

sudo apt-add-repository ppa:mscore-ubuntu/mscore-stable
sudo apt-get update
sudo apt-get upgrade