kbesig:
Getting closer: I can run tor arm as root, but get this error as <user>: ~$ sudo -u debian-tor arm [sudo] password for <user>:
Urg… please never do that. You should not run applications with the same privileges as Tor.
What you want is to add your current user to the “debian-tor” group:
sudo adduser $USER debian-tor
Then arm should be able to connect to the system-wide Tor daemon unless you have changed the default Tor configuration.