Running Gui apps as superuser

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http://forums.opensuse.org – Hi All, Im comming from ubuntu/mint and one of the things I got used too was doing something like "sudo nautilus" or "sudo gedit" and similar things. In Suse 11.3 I always get errors like the following (gedit:6115): Gtk-WARNING **: cannot open display: kate: cannot connect to X server Could not parse arguments: Cannot open display: or similar variations of these. What can I so to prevent this from happening? even if I do "su" and try from there it doesnt always work. I like Suse as it fe (Distributions)