How to set up the environment variable DISPLAY in Linux :
1- Redhat
2- SuSe

I used : export DISPLAY=donner: 0.0 donner is the domain name.

it said :
you must specify the environment variable DISPLAY
e.g. setenv DISPLAY aran:0.0
or setenv DISPLAY fl1:0.0
... etc
Program terminating
DISPLAY=

Who knows, please Help !
Thank...