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Old 07-05-2005, 08:15 AM   #1
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Registered: Jul 2005
Location: Dallas, Tx
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Xterm works find under root but getting error on other accounts.

I recently setup FC3 on my computer at home. I have a 700 Mghz computer I built myself. My problem is that I have decided to set it up as a server running Linux. I have been trying to install Oracle 9i on it and it lead me to a problem I am having with xterm under accounts other than root. When I am logged in as root, xterm works just fine. When I try to run it as any other account (after I have suse'd into it), I get the error unable to open display "localhost:0.0". Do I need to log in as the other account from the login screen to make it work?
Old 07-05-2005, 08:33 AM   #2
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Registered: Nov 2003
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As a security feature, X11 does not allow other users to start a window in an active display.

As a simple example of why this is a good idea imagine a malicious user starting up a Firefox browser pointed at a porn site on *your* X11 screen just as your boss walked past.

There are ways to disable this feature, but the best things to do are:

(a) Not log into X as root, it's bad for security

(b) Start up a new Xterm and use the "su" command to switch to the other user when necessary.
Old 07-05-2005, 08:40 AM   #3
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Thanks. Of course right now, this machine does not have access to the internet but I hope to have that issue resolved soon also. I will keep that in mind. Of course the instructions I had for installing Oracle said to SU in as the oracle id. I will try logging in as another account and see how that goes.
Old 07-05-2005, 01:19 PM   #4
Registered: May 2004
Location: England / Switzerland
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Of course, if you do want other users to be able to pop up windows in your X session then you can do this from a terminal:

xhost +localhost


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