ThinLinc profiles¶
ThinLinc allows for different profiles to be configured, where in the most general of cases a profile maps to a specific desktop environment. Unless there is only one profile available, the users will be presented with a menu after logging in. Here they can choose for example between a desktop suited for engineering users, a desktop suited for the marketing department or perhaps for starting a Windows remote desktop client session.
The example configuration files that are delivered with ThinLinc have several different alternatives, however only those profiles that are actually available on the system are displayed. If no profiles are available the user will be shown an error upon starting a session informing them that no profiles were found. This can happen, for example, if no desktop environment has been installed on the agent. For other reasons see Common issues.
This example configuration is meant to be customized for each individual ThinLinc installation.
It is possible to bypass the profile chooser and start a custom session, see xstartup.default.
Configuration¶
The available profiles are configured either via the web administration interface, or
using the configuration files under the /profiles path. The
default configuration includes a number of examples.
If the default parameter is present, it specifies the default profile.
The profile chooser will have this entry selected when it starts, and it
may also be used automatically for some error conditions.
The order parameter selects which profiles should be available for
selection, and the order in which they are displayed. This is a
space-separated list.
If the show_intro parameter is true, a configurable introduction text
will be displayed and requires user input to proceed with the logon
process. The introduction parameter is a text that will be displayed
if introduction is shown. This text block also supports Pango Markup
format styling for a fancier text layout.
Each profile is defined under a section named
/profiles/<profile key>. For most desktop environments
only the xdg_session parameter needs to be configured. For custom
profiles more values need to be specified, mainly cmdline. Please see
Parameters in /profiles/ for more details on the available options.
Custom desktops¶
Please read Building custom Linux desktops with the ThinLinc desktop customizer for documentation on how to configure different desktops with for example different menu and desktop icons depending on what profile is selected.
Single application¶
A profile can also be used to run only a single application instead of a
desktop. This can be achieved using the cmdline parameter for a
profile, in combination with the tl-single-app command.
Common issues¶
In some cases, ThinLinc will fail to find available profiles. This can
happen for a few different reasons, and different errors are shown in
each case — see below. More information is available in the agent’s
session log for the user,
/var/opt/thinlinc/sessions/<username>/last/xinit.log, or the
setup log on the agent, /var/log/thinlinc/setup.log.
No desktop environments installed¶
This error is shown when no X11 desktop environment is installed on the agent. For most use cases, ThinLinc requires an X11 desktop environment to work. Also, there should be at least one configured ThinLinc profile mapping to an installed desktop environment.
The recommended solution is to install a desktop environment, for example GNOME, KDE, XFCE or Mate. Preconfigured profiles are available for the most common desktops. Note that an X11-type desktop environment is required.
No X11 desktop environments installed¶
This error is shown when only Wayland-type desktops are installed on the agent — ThinLinc requires X11-type desktops. Also, there should be at least one configured ThinLinc profile mapping to an installed X11 desktop.
The recommended solution is to install the X11 version of a desktop environment. If the current desktop has no X11 version, the recommendation is to install a different desktop environment. Preconfigured profiles are available for the most common desktops.
Missing ThinLinc profile configuration¶
This error is shown when no profiles match the currently installed desktop environments on the agent. Although there is at least one installed desktop on the agent, none are matching currently configured profiles. For most use cases, there must be at least one profile mapping to an installed desktop.
The recommended solution is to install a different desktop environment, for example GNOME, KDE, XFCE or MATE. Preconfigured profiles are available for the most common desktops. Note that an X11-type desktop environment is required.
If no profiles match the wanted desktop, the creation of a new profile should be considered — see Parameters in /profiles/. A preconfigured profile can be used as a template.
No available ThinLinc profiles¶
This error is shown when no profiles are available for the current user, despite the presence of configured profiles matching the installed desktop environments on the agent.
The recommended first step is to verify that the correct profiles are
activated. This can be achieved via the web administration interface, or by ensuring that
the correct profiles are listed in /profiles/order.
If the profiles are activated properly, the second step is to check that
/profiles/<profile key>/testcmd returns zero for the
user in question.
