HP-UX System Administrator's Guide: Configuration Management

Setup for a Non-HP-UX Client System
If you are logged in to the target system from a non-HP-UX client system, you need to
do the following:
On your non-HP-UX client system, start your X Window server and determine
your IP address. This is often available in the Help About menu item of the program
screen. If the client is connected to an HP-UX system, the command echo
$DISPLAY will show the IP address.
On the target system, set your DISPLAY environment variable to the IP address
of your client system:
# export DISPLAY=clientsystemIP:0.0
Using the X Window System 33