Unix socket does not exist (Linux)

Error: No such file or directory (os error 2) when trying to connect to a location.

The socket at /var/run/defguard.socket is created by the defguard-service background service. If this service is not running, the socket does not exist and the GUI client cannot establish a connection.

Fix

Run the following to enable and start the background service:

# Reload systemd to pick up the service file
sudo systemctl daemon-reload

# Enable the service to start on boot
sudo systemctl enable defguard-service

# Start it immediately
sudo systemctl start defguard-service

Verify the service is running:

systemctl status defguard-service

If the service fails to start, check its logs:

journalctl -u defguard-service -n 100