Identifying the target display in z/OS UNIX System Services

The DISPLAY environment variable is used by the X Window System to identify the host name of the target display.

The following is the format of the DISPLAY environment variable:

   host_name:target_server.target_screen

Value: Description
host_name: Specifies the host name or IP address of the host machine on which the X Window System server is running.
target_server: Specifies the number of the display server on the host machine.
target_screen: Specifies the screen to be used on the target server.

For more information about resolving a host name to an IP address, see z/OS XL C/C++ Runtime Library Reference.