On Sat, 17 Mar 2001, Bret Hughes wrote:

> Date: Sat, 17 Mar 2001 23:38:19 -0600
> From: Bret Hughes <[EMAIL PROTECTED]>
> Reply-To: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: Re: Connection refused to X server
>
> [EMAIL PROTECTED] wrote:
>
> > I must have screwed something up today.  When I su to root and try to execute a 
>program (red-carpet), I get the following:
> >
> > Xlib: connection to ":0.0" refused by server
> > Xlib: Client is not authorized to connect to Server
> >
> > Any idea what might be causing this, or better yet, how to fix it?
> >
>
> the user running x has no given root the right to use the display.  as
> the user issue the command
> xhost +localhost
>
> this gives all users on the local machine the right to use your display.
>   I do no know how to do this for a single user only.
>
> HTH
>
> Bret
>

The manual page has the answer to this:

       [+]name The  given  name  (the  plus  sign is optional) is
               added to the list allowed  to  connect  to  the  X
               server.   The  name  can  be a host name or a user
               name.





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