Getting the code

Browse on gitweb

# clone over git://
git clone git://

# or over ssh:
git clone ssh://

Getting access to the DB

There are two ways to get access to a UDD DB:

Access it remotely

ssh -NL

Or directly on ullmann:

ssh -NL 5452:localhost:5452

Create a Local Replica of UDD

As we can see from UDD main page, there is a dump available.

So if we want to do some test, maybe a local replica of UDD can be handy, and that's what this page will describe.

Install Needed Packages

UDD runs on PostgreSQL, so we need to install it plus the necessary extensions for UDD:

sudo apt-get install postgresql postgresql-plperl-9.4 postgresql-9.4-debversion

In case the latter two packages don’t work, you might need to upgrade the version number.

Setup PostgreSQL Server

Modify /etc/postgresql/9.4/main/pg_hba.conf to trust local connections:

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all               trust
# IPv6 local connections:
host    all             all             ::1/128                 trust

Modify /etc/postgresql/9.4/main/postgresql.conf to listen on port 5452 (same as the real UDD instance on

port = 5452

Restart postgresql with this new configuration:

service postgresql restart

Now we got an "empty" PostgreSQL db server, let's import some bits.

First we create some users/roles by switching to the postgres user which is used for database administration, then running createuser:

$ sudo su postgres
$ createuser udd
Shall the new role be a superuser? (y/n) n
Shall the new role be allowed to create databases? (y/n) n
Shall the new role be allowed to create more new roles? (y/n) n

This is the UDD user on the database, where the UDD objects will live.

$ createdb -T template0 -E SQL_ASCII udd
$ echo 'CREATE EXTENSION debversion' | psql udd

We create the database, named 'udd', forcing the encoding to SQL_ASCII, since that's the format of the export. We base it off 'template0' because 'template1' (the default) might be set to UTF8 which prevents creation of new SQL_ASCII databases.

UDD is actually using a "guest" user:

createuser -lDRS guest
psql udd -c 'GRANT usage ON schema public TO PUBLIC;'
psql udd -c 'GRANT select ON all tables in schema public TO PUBLIC;'

Import UDD Dump

Now we only need to download the dump and import it, with:

$ zcat /path/to/udd.sql.gz | sudo -u postgres psql udd 2>&1 | tee udd-import.log

that will import the dump into udd db redirecting messages to udd-import.log.

In case of error messages, you may identify the problematic query by issueing again the psql command with the "-e" option :

$ zcat /path/to/udd.sql.gz | sudo -u postgres psql -e udd 2>&1 | tee udd-import.log

Reimport UDD

If we already have a UDD replicated on our local machine and want to reimport the UDD dump, we need to:

$ sudo su postgres
$ dropdb udd
$ createdb -T template0 -E SQL_ASCII udd
$ echo 'CREATE EXTENSION debversion' | psql udd
$ zcat /path/to/udd.sql.gz | psql udd

so simply drop the db, recreate it and import the dump again.

Setup a local web server

Install some Ruby packages, needed for dmd.cgi

sudo apt-get install ruby-dbi ruby-dbd-pg ruby-debian ruby-oj vpim


Here is guidelines to provide UDD over localhost using apache2

sudo apt-get install apache2-mpm-worker

Minimal configuration that works, edit /etc/apache2/sites-enabled/000-default in the <VirtualHost> declaration, add

Alias /udd /path/to/udd/web
        <Location /udd>
                AddHandler cgi-script .cgi
                Options +ExecCGI +Indexes
                # For wheezy / Apache 2.2:
                Order allow,deny
                Allow from all
                # For jessie / Apache 2.4:
                Require all granted

Restart apache with this new configuration

sudo service apache2 restart


If you want to use Nginx, setup is a bit more difficult because NGinx don't support CGI out-of-the-box.

sudo apt-get install nginx-full fcgiwrap

Minimal configuration that works, edit /etc/nginx/sites-available/default and replace with :

server {
        listen 80 default_server;

        root /path/to/udd/web;
        index index.html index.htm;
        server_name localhost;

        location / {
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ /index.html;

        location ~ \.cgi$ {
          gzip off;
          fastcgi_pass  unix:/var/run/fcgiwrap.socket;
          include /etc/nginx/fastcgi_params;
          # fastcgi_param SCRIPT_FILENAME  /usr/lib$fastcgi_script_name;

Restart nginx with this new configuration

sudo service nginx restart

Common problems

Hack, hack, hack

Please submit patches to debian-qa mailing list.

Bugs can be filed against the pseudo-package, with user and usertag udd. See this bug for an example.

(see this bug for the correct pseudo-headers).