I am trying to configure vnc on my home server from may laptop. Both are running opensuse leap along with KDE.

I have googled for days with no luck.

So i install tightvnc on server from ssh connection using yast on terminal.

then i run
susebox:~ # vncserver 
xauth: (argv):1:  bad display name "susebox:2" in "add" command

New 'susebox:2 (admin)' desktop is susebox:2

Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/susebox:2.log
susebox:~ # vncviewer susebox:2

TigerVNC Viewer 64-bit v1.6.0
Built on: ??-??-?? ??:??
Copyright (C) 1999-2015 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
Can't open display:
i tried # vncviewer ip_server:2 also got an error

i disable firewall, still no luck...
i have find this topic here, there are lot covered my topic but still i couldn't solve my problem...