Comment je connecte en mode graphique

Bonjour,
svp aide moi quand je me connecte par putty ssh depuis mon pc distt xp sur mon autre pc distn linux redhat j'arrive pas a ce connecter en mode grapohique et c'est ce que me donne comme message qcq je fais svp repond moi le plus vite merci

[root@localhost root]# vncserver
You will require a password to access your desktops.

Password:
Verify:

New 'X' desktop is localhost.localdomain:1

Creating default startup script /root/.vnc/xstartup
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/localhost.localdomain:1.log

[root@localhost root]# vncviewer
Error: Can't open display:
[root@localhost root]# startx
Using authority file /root/.Xauthority
Writing authority file /root/.Xauthority
Using authority file /root/.Xauthority
Writing authority file /root/.Xauthority

Fatal server error:
Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock
and start again.

When reporting a problem related to a server crash, please send
the full server output, not just the last messages.
Please report problems to xfree86@xfree86.org.

Xlib: connection to ":0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
giving up.
xinit: unable to connect to X server
xinit: No such process (errno 3): Server error.
[root@localhost root]#