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Installation: X2go Server with PostgreSQL database backend

This wiki page explains how you can configure X2go with PostgreSQL as database backend. However, this is only recommended for sites that run more than one X2go server (X2go server cluster). If you have one standalone X2go server then please use the SQLite database backend (which is the default after installation of the x2goserver package).

Changes since x2goserver v3.0.99.x:

The sudo command is no longer required by x2goserver to neither contact the SQLite database (installation default) nor the PostgreSQL database. Since v3.0.99.x PostgreSQL views and rules are used to restrict users from modifying or accessing data of other users.

The sudo command is neither required for the use of x2godesktopsharing (but the users who are allowed to take part in desktop sharing must be part of group x2gousers).

For accessing the X2go/PostgreSQL database Perl DBI has been used in x2goserver.


  • configure PostgreSQL server to enable TCP connections from your X2go server host
  • configure PostgreSQL server for md5 authentication for users from x2goserver in


# IPv4 local connections:

host    all         all          md5

You must create a database user which can create databases and users for X2go database administration. You can also use the postgres user to do this job.

You must save the password of this user in the file


Only root should have access to this file. It will be used only for database and user creation, you may/should delete it after these tasks are done. You can set a new password using this command on your PostgreSQL server:

$ su postgres -c "psql"
psql (8.4.8)

You are using psql, the command-line interface to PostgreSQL.
Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help with psql commands
       \g or terminate with semicolon to execute query
       \q to quit

postgres=# alter user postgres encrypted password '<secret-password>';
postgres=# \q

Database configuration in file /etc/x2go/x2gosql/sql:

#postgres or sqlite


#database admin (must have permissions to create databases and users)

#disable: SSL connections are never used
#allow: try non-SSL, then SSL
#prefer: try SSL, then non-SSL
#require: connect only with SSL
#default - prefer

Database administration using /usr/lib/x2go/script/x2godbadmin (on X2go server).

$ /usr/lib/x2go/script/x2godbadmin --help
X2Go SQL admin interface. Use it to create x2go database and insert or
remove users or groups in x2go database
x2godbadmin --createdb
x2godbadmin --listusers
x2godbadmin --adduser|rmuser <UNIX user>
x2godbadmin --addgroup|rmgroup <UNIX group>

Create database (evoke on X2go server):

$ x2godbadmin --createdb

Create database users:

You can add UNIX users or groups to database using commands
$ x2godbadmin --adduser example

$ x2godbadmin --addgroup x2gousers

After that step users can create x2go sessions.

Installation (for x2goserver < 3.0.99.x - old code, please upgrade your x2goserver)

:!: Before you begin! → Note that you are using old and insecure code… Please upgrade to a current version of x2goserver.

The following documentation only exists for historical reference and it will be removed soon from this wiki.

Please make sure that you have added the x2go repository to your package management system. The required steps are described here: adding the x2go repository (debian)! You'll further need to have some experience with x2goprint and maybe x2goserver.

Using an existent database server on the network

If you want to use an already existent PostgreSQL database server in your network, you'll need to allow the x2goserver(s) access to the database server. First of all, you'll need to tell the address of the target server to every x2goserver:

# echo -n „address of postgres server“ > /etc/x2go/sql

Furthermore you'll need to allow “passwordless” authentication via SSH keys. Please don't add a “paraphrase” to the generated key:

# mkdir /root/.x2go/ssh/.pg
# ssh-keygen -t dsa -f /root/.x2go/ssh/.pg/id_dsa

To copy the public part of the key to the PostgreSQL server, you may use the “ssh-copy-id” command to combine transfer and paste command, or you can paste the key after transferring it by yourself (make sure file permissions for SSH key authentication are set correctly):

# mkdir -p ~postgres/.ssh/
# cat id_dsa-pub >> ~postgres/.ssh/authorized_keys
# chown -Rf postgres:postgres ~postgres/.ssh
# chmod -Rf go-rwx ~postgres/.ssh

You can test the needed connection by entering following command:

# ssh -i /root/.x2go/ssh/.pg/id_dsa postgres@server

You'll also need to run the “” script as described before on the database server to create the needed instance.

New server packages (deb and tar.gz) are available over our heuler repository:

You can install this packages with apt: deb heuler main

Please keep in mind, that the heuler archive is an additional repository - you'll need to have the lenny repository configured as well!

wiki/advanced/multi-node/x2goserver-pgsql.1318879733.txt.gz · Last modified: 2013/03/08 13:31 (external edit)