I can't run sudo nautilus, but if I run only nautilus in terminal it runs.
And also I can't run native application via terminal using sudo.
Terminal shows me a warning if I run using sudo:
This pic shows, if I run nautilus in terminal it works:


idfrom terminal, then compare the result forsudo id& you'll note your a different user. – guiverc Dec 28 '17 at 07:13