You might encounter this issue when you close and reopen your terminal session after adding your user to the docker group.
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock typically occurs when the current user does not have the necessary permissions to access the Docker daemon.
To resolve this issue, add your user to the docker group, which grants the necessary permissions to interact with the Docker daemon without requiring sudo for every command.
Recommended fix (requires reboot)
sudo groupadd docker
sudo usermod -aG docker $USER
sudo reboot # It may be necessary to reboot for the changes to take effect.
docker ps # test connection
Temporary workaround (no reboot)
This approach is not recommended as a permanent solution. Use it only as a temporary workaround when you need to work immediately without rebooting.
newgrp docker
sudo chmod 666 /var/run/docker.sock
docker ps # test connection