Error when trying to start wireshark under X11

Kok-Yong Tan ktan at
Sun Jul 15 19:39:31 PDT 2012


Can anyone tell me what this error means when I try to start wireshark 
in an xterm window via the X11 system:

bash-3.2$ sudo wireshark

(wireshark:11767): Gtk-WARNING **: cannot open display: :0.0

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