From scratch:
Get the Virtuoso package provided by Francois.
These are zipped information, plz refer to the official guide for better explenation.

Install the required packages in ubuntu server edition 9.10 [[BR]]

6.31-17-generic-pae #54-Ubuntu SMP Thu Dec 10 17:23:29 UTC 2009 i686 GNU/Linux:

{{{
sudo aptitude install autoconf automake libtool flex bison gperf gawk m4 make libssl-dev
tar xzvf virtuoso.tar.gz
cd virtuoso
./configure --prefix=/usr/local
make
sudo make install
cd /usr/local/var/lib/virtuoso/db/
sudo virtuoso-t -f & 
}}}

I'll add asap the config to expose your service if you are using virtuoso inside a virtual box machine.
Ok you you have the NAT enabled for yout virtual machine add these lines into "yourhome\.VirtualBox\Machines\YourMachine.xml"

{{{
      <ExtraDataItem name="VBoxInternal/Devices/pcnet/0/LUN#0/Config/virtuoso/GuestPort" value="8890"/>
      <ExtraDataItem name="VBoxInternal/Devices/pcnet/0/LUN#0/Config/virtuoso/HostPort" value="8890"/>
      <ExtraDataItem name="VBoxInternal/Devices/pcnet/0/LUN#0/Config/virtuoso/Protocol" value="TCP"/>
}}}




----

For the SemWeb installation contest I was looking on the web for a simple way to install Virtuoso on my virtualized Ubuntu server 9.10[[BR]]

Note: Virtuoso v5.0.12[[BR]]


It seems that kubuntu guys are very excited about semantic web & desktop [http://www.kubuntu.org/news/kde-sc-4.4-rc-2] and their interest come from this application [http://nepomuk.semanticdesktop.org/xwiki/bin/view/Main1/].[[BR]]


just few lines: 

{{{
sudo aptitude install python-software-properties
sudo add-apt-repository ppa:kubuntu-ppa/beta
sudo apt-get update
sudo aptitude install virtuoso-server
sudo aptitude install virtuoso-drivers
}}}