Re: Gtk-WARNING **: cannot open display:
The problem you have is with sudo, not with your shell. What happens is that
in the configuration file (/etc/sudoers) the env_reset option is set, which
causes most of the environment variables to be deleted. This option comes
enabled by default because of some conflictive variables:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-January/041632.html
The fix I suggest is adding a env_keep directive in the env_keep line:
Defaults env_reset, env_keep = DISPLAY
--
Felipe Sateler
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