How to create Xauthority file?

Question

I am trying to run nautilus with gksudo nautilus. However, whenever I try, this dialog appears:

Along with the following message in the terminal:

Error copying '/home/.../.Xauthority' to '/tmp/libgksu-v8QBGW': No such file or directory

Then I tried to create a new ~/.Xauthority file by sudo touch ~/.Xauthority. Once I run gksudo nautilus, a dialog asks for my password (also, I cannot write in the textbox, only paste. So I paste my password...)

The following error shows:

Unable to init server: Could not connect: Connection refused

(nautilus:4202): Gtk-WARNING **: cannot open display: :0

I've looked everywhere but cannot find a solution. Also, I cannot open any other visual interface using root, like gksudo synaptic, as the same happens. Please help.

Solution

As muru suggested with the URL, doing xhost si:localuser:root solved the issue. If he/she wants to answer the question, I will accept it as the correct one.

Comments

[muru]

askubuntu.com/questions/961967/…

[lucasdelevy]

Thank you, @muru. I had just solved it by doing "xhost +", then I saw the link you posted, which is more appropriate. I wish I could choose your comment as a correct answer.

[lucasdelevy]

Thanks for your answer. I did what you said and got the error (gksudo:16130): Gtk-WARNING **: cannot open display: 1. When I do ls /tmp/.X11-unix, I get: X0 X1024. So, even changing DISPLAY=1024 gets me the same error.