UCS 2.4 - Univention

9.5 Thin client environment
are not installed automatically. These can be found in the additional package univention-thin-client-
x-fonts. If this package is not installed, they can alternatively be fetched from a font server. Further
information can be found in Section 9.5.2.7.
Support for local printers attached to the thin client is provided by a separate package (univention-thin-
client-cups). The same applies for the use of local USB devices on the thin client (univention-thin-client-
ltsp) and audio output (univention-thin-client-sound).
These packages replace all functions of the monolithic thin client base system from earlier UCS versions.
All these packages are installed as replacements when UCS installations are updated.
Installation
All components of the thin client base system are installed via the standard package management tool
(see Chapter 11). The components contain meta packages which install the necessary expansions for the
respective components in the subdirectory in the thin client environment.
The thin client base package includes the command univention-thin-client-apt for this mecha-
nism, which makes it possible to install packages (including dependencies) in the subdirectory of the thin
client environment. The tool supports all parameters from apt-get and a few additional, optional, parame-
ters of its own. When they are given these must be listed before the apt-get options. ’--’ should be entered
as a separating sign before the apt-get options. The following parameters are available:
--help, -h: Displays a short help for using the command.
--prefix, -p: Defines the directory in which the packages should be installed. The predefined value is the
directory for the thin client environment.
--arch, -a: Specifies the architecture to be used for the packages. The predefined value here is i386, i.e.,
the thin client environment is also uses i386 packages on amd64 systems.
--debug, -d: Sets the log level. Possible values are in the region from 0 (no output) to 4 (detailed informa-
tion)
With univenton-thin-client-apt further packages can be installed in the thin client environment which are
not included in the existing components. For example, the following command can be executed to install
the Emacs editor in the thin client environment.
univention-thin-client-apt install emacs21
For example, the following command can be executed to simulate the installation of the emacs21 package
in a thin client environment below /var/lib/thin-client2.
univention-thin-client-apt -s -- -p /var/lib/thin-client2 -d 4 install emacs21
In this the APT configuration of the sources and the cache directory of the terminal server are used. Nec-
essary dependencies are resolved directly and installed in the thin client environment. A i386 repository is
necessary for this on amd64 systems.
Configuration
The configuration of services on UCS systems is normally performed using Univention Configuration Reg-
istry. On thin client systems this is possible using Univention Configuration Registry policies (see Section
14). These can be created in Univention Directory Manager and linked with the thin client objects.
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