I just noticed that there is a torrc process running on my Ubuntu machine.

I'm seeing this when I do a ps.

debian-+ 1260 0.3 0.7 76064 31384 ? Ss 03:46 0:00 /usr/bin/tor --defaults-torrc /usr/share/tor/tor-service-defaults-torrc -f /etc/tor/torrc --RunAsDaemon 0

It starts at boot, and if I kill it it restarts. Is there a relay running on my machine? If so, how do I stop it? I can't spare the bandwidth.

It's not the torrc process - it's a tor process with command-line arguments too long to fit into one line, so it's split in two. The part "/usr/share/tor/tor-service-defaults-torrc -f /etc/tor/torrc --RunAsDaemon 0" is actually the command line arguments for tor process:

  • --defaults-torrc /usr/share/tor/tor-service-defaults-torrc sets the config file to read the defaults from. It says "not use built-in ones, read them from there"
  • -f /etc/tor/torrc tells to read the settings from /etc/tor/torrc file
  • --RunAsDaemon 0 tells tor not to become a daemon process even if in defaults-torrc or torrc config it was told to do so. It's a command line level override
  • Okay. Looking at it again I can see that you're right. I'm not sure where my head was last night. So why is there a tor process running? – Dave Sep 12 '17 at 15:22
  • how exactly has you installed Tor? from packages/repository? From sources? – Alexey Vesnin Sep 12 '17 at 15:28

The tor process is automatically started by the system service manager by default.

It is not a relay by default, only a client, so you are not relaying other peoples traffic.

To temporarily stop the service issue the command sudo service tor stop.

To disable the service:

  • If you're running Ubuntu >= 15.04 issue the command: sudo systemctl disable tor
  • If you're running an older version of Ubuntu issue the command: echo manual | sudo tee /etc/init/tor.override

When it's not running, to manually start the service issue the command sudo service tor start.

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