[FIX] Linux OS: Cannot open display GUI for Wayland

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Published on January 2, 2018 6:04:29 AM ● Video Link: https://www.youtube.com/watch?v=1xIvppquqco

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E:
No protocol specified
Unable to init server: Could not connect: Connection refused
(gedit:2284): Gtk-WARNING **: cannot open display: :0
Fix??
$xhost +si:localuser:root
[see]localuser:root being added to access control list
Mean: add user to root(sudo GUI + terminal)
$xhost -si:localuser:root
Mean: Reset to default, user cannot run root(GUI) in terminal.
test with :$sudo nautilus
-- Done --