> library(shiny)
> runExample("01_hello")

Listening on http://127.0.0.1:6671
No protocol specified
Unable to init server: Could not connect: Connection refused
Error: cannot open display: :0
/usr/bin/xdg-open: line 832: x-www-browser: command not found
No protocol specified
Unable to init server: Could not connect: Connection refused
Error: cannot open display: :0
/usr/bin/xdg-open: line 832: iceweasel: command not found
/usr/bin/xdg-open: line 832: seamonkey: command not found
/usr/bin/xdg-open: line 832: mozilla: command not found
No protocol specified
Unable to init server: Could not connect: Connection refused
Failed to parse arguments: Cannot open display: 
/usr/bin/xdg-open: line 832: konqueror: command not found
/usr/bin/xdg-open: line 832: chromium-browser: command not found
No protocol specified

(google-chrome:3239): Gtk-WARNING **: cannot open display: :0
/usr/bin/xdg-open: line 832: www-browser: command not found
/usr/bin/xdg-open: line 832: links2: command not found
/usr/bin/xdg-open: line 832: elinks: command not found
/usr/bin/xdg-open: line 832: links: command not found
/usr/bin/xdg-open: line 832: lynx: command not found
/usr/bin/xdg-open: line 832: w3m: command not found
xdg-open: no method available for opening 'http://127.0.0.1:6671'