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Old 12-05-2008, 02:18 AM   #1
Registered: Jan 2004
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running programs as root in a terminal

Hello folks

I just upgraded to fedora 9 (from fedora 7)
and (amongst many things) i can't seem to run X-programs from a shell while being logged in as root.

For example, i used to run kTorrent from a shell, while being logged in as root in the terminal, and as the user in X-win. Now that program doesn't open when i do that.

When i run #ps
i do see the process listed. and if i type kTorrent again, i'll get yet another process called torrent in the ps list.

is there a variable somewhere or a setup thing that i'd need to change for this?

please let me know asap


Last edited by santiagosilva; 12-05-2008 at 05:03 AM.
Old 12-05-2008, 07:56 AM   #2
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I can think of at least two possible reasons for this to happen. Since you didn't provide any error messages I will address both problems.

Issue the following command when you first open the terminal and while you are still logged in as the normal user.
xhost +local:
Issue the following command after you you have logged on as root using su or sudo -i.
export DISPLAY=":0.0"
The first command allows your desktop manager to accept connect requests from other processes running as other users on the same machine. That means that root is allowed to create a window on your desktop.

The second command tells root's environment to open X windows on the local display named 0.0. It is possible to have several concurrent displays on one machine although it is unusual.

Last edited by stress_junkie; 12-05-2008 at 08:00 AM.
Old 12-05-2008, 11:38 AM   #3
David the H.
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If you use "su -" to enter the root shell it should carry over your current user's environment. You may still have to allow localhost to connect to x though.

Another option is to run "kdesu program-name" (or gksu in gnome) as your normal user, which will launch the program with the graphical "run as root" dialog.

BTW, why on earth would you want to run ktorrent as root anyway? That's not the kind of program that normally needs, or should have, administrative privileges.

Last edited by David the H.; 12-05-2008 at 11:40 AM.
Old 12-05-2008, 12:58 PM   #4
Registered: Jan 2004
Posts: 214

Original Poster
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I don't get any error messages that's the thing.

# > ktorrent
[1] 3325
# >
# >ps
3298 pts/1 00:00:00 su
3301 pts/1 00:00:00 bash
3325 pts/1 00:00:00 ktorrent (or kopete)
3326 pts/1 00:00:00 ktorrent (or kopete)
3330 pts/1 00:00:00 ps
# >

the "xhost local" and the gksu didn't work.
the first options had the same result as before. (no messages no nothing..)

and when i try to use gksu or kdesu, it says those programs don't exist. and i can't find them when i try to install them.

(It's just i'm used to navigating and running programs and what not willy nilly is all. that's why i like doing it that way.)

thanx folk


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