Install dependencies:

aptitude install apache2 subversion subversion-tools libapache2-svn php5 php5-sqlite3 php5-sqlite


Prepare a site-enabled apache config:

NameVirtualHost *
<VirtualHost *>
  ServerAdmin webmaster@localhost
  DocumentRoot /var/usvn
</VirtualHost>


Download and untar the latest usvn from http://www.usvn.info/download :

cd /var
wget wget http://www.usvn.info/download/get/0.7.1%20Eddie/tgz.dl
tar xzvf usvn-0.7.1.tgz
chown www-data:www-data usvn


restart apache, open firefox and follow the steps.