This is X-security mechanism - Magic Cookies. By default, only the
person who started the X session can connect to the server. I'm
guessing that you started X as a user then su'ed to root in an xterm, or
that you started X as root, and then the script runs as a different
user.
There are two ways to allow access to an X-server:
1) xhost. See man xhost. As an example, 'xhost +localhost'
will allow anyone connected to your machine to connect to the
server. This method is not recommended, as it is a big
security issue. There should be more about this is the FAQs
'cos there was quite a lot on this list a couple of months
ago. (2) is better:
2) If you just want root to be able to connect to the server, su
to root in an xterm, then type:
export XAUTHORITY=/home/<user>/.Xauthority
If you always want to use this with the same user (eg if you
have a single-user machine, you can add this to (eg) the
/root/bashrc or /root/bash_profile files, but you won't then
be able to actually start X as root.
HTH
Rich
Lance Hoffmeyer wrote:
>
> I was trying to run a setup program in X. I logged in as su and ran the
> script. This was the error message. The Xlib: connection to ":0.0" refused
> by server error is the same message I get when I try to run rvplayer. What
> does the error mean and how do I fix it?
>
> Spawning X setup utility for Chklogs package
> Xlib: connection to ":0.0" refused by server
> Xlib: Invalid MIT-MAGIC-COOKIE-1 key
> Application initialization failed: couldn't connect to display ":0"
> Error in startup script: invalid command name "wm"
>
> Lance
>
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