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Old 01-20-2006, 06:37 PM   #1
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Registered: Feb 2005
Distribution: Slackware 10
Posts: 27

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Can't run paticular programs as root terminal -- Slack 10.2

When I'm on my personal account (/home/user), I run my terminal client and run some programs from there -- they work fine. But when I log in as root in the terminal while still in my windows manager, I can't run paticular programs that were installed on the initial setup. For example, I can't run KATE, java, kedit and a couple others I can't think of at the moment, as root in terminal -- but while still in my personal account. THis is true for me when logged in on my personal account when using KDE or fluxbox. But when I log into my windows manager as root, they work just fine. I would search for this and find the answer myself, but I don't know what to call this.
Old 01-20-2006, 07:31 PM   #2
Senior Member
Registered: Dec 2005
Location: Brisbane, Australia
Distribution: Slackware64 14.0
Posts: 4,124

Rep: Reputation: 164Reputation: 164
I assume you're using `su` to login as root, but you don't say what the error is. Are you getting command not found errors or something like 'Xlib: connection to ":0.0" refused by server'? For the first one, your path isn't the same when you su - you may have to type in the full command (e.g. /usr/local/jdk/bin/java).

For the second one, you don't have permission, even as root, to use your user account's X display. Try running the following after you su to root (substitute your username):

/usr/X11R6/bin/xauth merge ~username/.Xauthority
I sometimes end up with the ownership on ~username/.Xauthority changed to root when I do this - so check it after you run the merge.
Old 03-30-2006, 03:35 AM   #3
Registered: Mar 2003
Distribution: Slackware 14
Posts: 73

Rep: Reputation: 15
Hi there, I have the same problem and I couldn't solve it

/usr/X11R6/bin/xauth merge ~username/.Xauthority
When I try to run apps from konsole as root I get this

[root@darkstar]:# airfart
Xlib: connection to ":0.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key

(airfart:9019): Gtk-WARNING **: cannot open display:
I also tried some other techniques that I found here in LQ,
that didn't help too.

Please help me.
Old 03-30-2006, 04:35 AM   #4
Senior Member
Registered: Jul 2004
Location: Lower Rhine region, Germany
Distribution: Slackware 14.1 (32 and 64 bit)
Posts: 1,539

Rep: Reputation: 101Reputation: 101
Try to start it with giving full path. If I su to root and do kate it is not in my path, when typing /opt/kde/bin/kate it starts without a problem.
Old 03-30-2006, 04:39 AM   #5
Senior Member
Registered: Aug 2003
Location: UK
Distribution: Slackware
Posts: 3,217

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If you get cannot open display errors try adding -display :0.0 to your command line
Old 03-30-2006, 01:11 PM   #6
Registered: Jun 2004
Location: West Virginia
Distribution: Gentoo, Debian
Posts: 52

Rep: Reputation: 15
Try (as non-root):
$> xhost+
$> su -
$> export DISPLAY=:0.0
$> kate


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