When I am running some software using sudo command it showing error like
cannot connect to X serverFor example if I run the following command:
$ sudo gedit /etc/profileI am getting following command
(gedit:6758): WARNING **: Command line `dbus-launch --autolaunch=84b871d735f31ffe014dc9ba00000009 --binary-syntax --close-stderr'
exited with non-zero exit status 1:
Autolaunch error: X11 initialization failed.
Cannot open display:
Run 'gedit --help' to see a full list of available command line options.Or if I am running super-boot-manager I am getting following error
buc: cannot connect to X serverPlease help.
115 Answers
You need to allow the root user access to the X server:
xhost local:rootAnd point the command to the right DISPLAY:
sudo DISPLAY=$DISPLAY gedit /etc/profileFinally the problem is solved. I have just added the line:
Defaults env_keep="DISPLAY XAUTHORITY"
at the end of visudo.
To do that you have to run
sudo visudo
it will open the file then add the above line at the end.
Thanks to all, specially @Thor for kind help
2Supplementing @Thor's answer:
Run xhost local:root before sudo gedit. To make this permanent, add the line
xhost local:rootto the file ~/.xinitrc 1. Create the file if it doesn't exist.
[1]
1Actually the code you are running has cv2.imshow() or any other display commands, for remote running of code you have to comment them, and better save for visualization.
0set DISPLAY and XAUTHORITY variable environment before running your scrip.
for example in systemctl service file:
[Unit]
Description=Start Clock
[Service]
Environment=DISPLAY=:0
Environment=XAUTHORITY=/home/pi/.Xauthority
ExecStart=/usr/bin/python3 /home/pi/clock.py
Restart=always
RestartSec=10s
KillMode=process
TimeoutSec=infinity
[Install]
WantedBy=graphical.target
