Adding and removing displays and terminals for the Common Desktop Environment

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You can add and remove displays and terminals for the Common Desktop Environment.

The Login Manager can be started from a system with a single local bitmap or graphics console. Many other situations are also possible, however (see the following figure). You can start the Common Desktop Environment from:
  • Local consoles
  • Remote consoles
  • Bitmap and character-display X terminal systems running on a host system on the network
Figure 1. CDE Interface Points. This illustration shows the connection points between a console, a network, a bitmap display, a character display, and a workstation.

An X terminal system consists of a display device, keyboard, and mouse that runs only the X Server. Clients, including the Common Desktop Environment, are run on one or more host systems on the networks. Output from the clients is directed to the X terminal display.

The following Login Manager configuration tasks support many possible configurations:

  • Removing a local display
  • Adding an ASCII or character-display terminal
To use a workstation as an X terminal, type the following at a command line:
/usr/bin/X11/X -query hostname

The X Server of the workstation acting as an X terminal must:

  • Support XDMCP and the -query command-line option.
  • Provide xhost permission (in /etc/X*.hosts) to the terminal host.

To remove a local display, remove its entry in the Xservers file in the /usr/dt/config directory.

A character-display terminal, or ASCII terminal, is a configuration in which the terminal is not a bitmap device.

To add an ASCII or character-display console if no bitmap display is present, perform the following steps:

  1. If the /etc/dt/config/Xservers file does not exist, copy the /usr/dt/config/Xservers file to the /etc/dt/config directory.
  2. If you have to copy the Xservers file to /etc/dt/config, change or add the Dtlogin.servers: line in /etc/dt/config/Xconfig to: 
    Dtlogin*servers: /etc/dt/config/Xservers
  3. Comment out the line in /etc/dt/config/Xservers that starts the X Server. 
    # * Local local@console /path/X :0
    This disables the Login Option Menu.
  4. Read the Login Manager configuration files.

To add a character-display console if a bitmap display exists, perform the following steps:

  1. If the /etc/dt/config/Xservers file does not exist, copy the /usr/dt/config/Xservers file to the /etc/dt/config directory.
  2. If you have to copy the Xservers file to /etc/dt/config, change or add the Dtlogin.servers: line in /etc/dt/config/Xconfig to: 
    Dtlogin*servers: /etc/dt/config/Xservers
  3. Edit the line in /etc/dt/config/Xservers that starts the X Server to: 
    * Local local@none /path/X :0
  4. Read the Login Manager configuration files.