Having Problems with X11 Forwarding and root

[kitepilot at kitepilot.com]

I just do:
ssh -fCXY root at turboviking /usr/bin/gnome-calculator
And get my banana...   :)
ET 

 

Mark Phillips writes: 

> There is an application I need to run as root on my Linode server, but it
> has to run in a gui. 
> 
> I have ssh and X11 forwarding set up between my Ubuntu 14.04 system and my
> Linode (swordfish). It works just great for a non-root user (xcalc,
> xconsole, the application I need to run, etc). However, when I try to run
> the application on the server as root, I get the error message "X11
> connection rejected because of wrong authentication." For xcalc running as
> root, I get
> X11 connection rejected because of wrong authentication.
> Error: Can't open display: swordfish:10.0 
> 
> I have tried all sorts of google solutions - copying the user's .Xauthority
> to /root/ (also changing the ownership and permissions). But I just can't
> seem to log into swordfish as a normal user using ssh -X, su to root, and
> get the X11 forwarding to work. 
> 
> I also went so far as to install vnc4server on the Linode, xfce window
> manager, and vnc4viewer on my Ubuntu machine. That all works when I access
> the vnc server as a normal user, but I can't get any X11 apps to run as
> root (ie from a root command line in a terminal in the vnc window). The
> error message when I try to run xcalc or other X11 apps is "No protocol
> specified. Can't open display :1". 
> 
> What are the special Linux guru magical incantations/spells to make X11
> forwarding work for root? 
> 
> Thanks! 
> 
> Mark