Omnis Technical Note TNLI0001 Updated November 2006

How to install Omnis Studio 3.x under Linux

For Omnis Studio 3.x and later
By Dr. Michael Hufschmidt

1. Omnis Installation for root

In most Linux distributions, the access to /usr/local/ requires root privileges, so you need to login as root in order to install Omnis Studio on a Linux machine.

The standard installation based on the file omnis.rpm (development environment), omnisrt.rpm (runtime version) or omserver.rpm (web server) will install Omnis Studio in one of the folders

/usr/local/rainingdata/osxx/ for the development version
/usr/local/rainingdata/osxxrt/ for the runtime version
/usr/local/rainingdata/osxxweb/ for the web server

where xx denotes the Omnis version, so the Studio 3.3 development version will install files into /usr/local/rainingdata/os33/ and in subdirectories below.

After the Omnis files have been created, you need to run a script to set up the correct Omnis environment. To do this, move to the Omnis root directory (let's assume the Studio 3.3 development environment for the following) and execute the omset script with the commands:
cd /usr/local/rainingdata/os33/

After that, the user root can start Omnis with the command
and will be prompted with the serialisation dialog.

2. Special problem for RedHat Users

Users of the recent redhat distributions reported a problem, they get an error message like
... GLIBC_2.0 not defined in file with link time reference
when starting Omnis. This bug has been looged under #87749 by redhat. As a workaround you should edit the file
and add the following two lines before the last line:

3. Giving Access to Users other than root

Problem: You would like to define a group-based solution, so you don't want to give everyone access ot Omnis. How can you do this?

When using Omnis, you need to have privileges to write into certain subdirectories below the Omnis root directory. Rather than giving global write privileges to all files, we recommend to use a different approach:

After logging in as root, define a group "omnis" with the command:
groupadd omnis

Then go to the Omnis root directory, assign all files to the new group and give write access to all members of that group:
cd /usr/local/rainingdata/
chgrp -R omnis *
chmod -R g=rwx *

As a last step, all users, who may use Omnis, have to be given membership to the group "omnis". The easiest way to do that is to use one of the maintenance programs provided with the Linux distribution (e.g. YaST2 for SuSE). Alternatively, you can edit the file
where you need to locate the line with Omnis and change it to something like
(assuming you want to give the users bob and mary access to Omnis).

4. Starting Omnis by a User

We recommend to add an Omnis Logo to your desktop. If you are using the KDE, right-click on the desktop and select "create link to a program" in the menu. This will open a dialog where you can define a name (like "Omnis Studio 3.3") and the command to be executed, which should be:
The correct icon for Omnis can be found at

5. Installing the Omnis Web Client

The Omnis Web Client must be installed by the root user. The following describes the manual installation using the files


rather than calling the Package manager with omweb.rpm. Get the latest versions of these web client files. They are also iincluded on the most recent Omnis Studio DVD (in the directory "/Web Client/Linux") or in an installed Omnis Studio development environment under:


First you need to find out where the browser is installed on your Linux system.

Firefox example: (please amend as appropriate for other browsers)
Depending of the Linux distribution, Firefox will be installed in one of the folders:


Open a terminal and enter the command:


in order to become root. Copy the files omweb and omweb.taz into the browser directory and enter that directory with the command

cd /opt/MozillaFirefox/lib/

Next execute the script with the command


this will create several symlinks, copy the files ORFC.class and into the browser's "plugins" folder; and create a folder named "omnis", where the Omnis Plug-in will collect and update the web client controls.

Consequently, this folder also needs to be writable at least by all users who are using Firefox. This can be achieved using the commands:

chgrp -R users omnis
chmod -R g=rwx omnis

6. Omnis Configuration for Firefox

In order to use Firefox from the Omnis development environment, you need to modify the Omnis ini-file located at


with your favourite text-editor. At the end of that file you should add the following lines:

OpenInNew=firefox $
OpenInExisting=firefox -remote 'openurl($)'

If this section is not available in the omnisxi.ini, you have to add these 4 lines at the end of the file.

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