Basta cercare nel manuale di tor, com'è logico...
I'm supposed to "edit my torrc". What does that mean?
Tor installs a text file called torrc that contains configuration instructions for how your Tor program should behave. The default configuration should work fine for most Tor users. Users of Vidalia can make common changes through the Vidalia interface — only advanced users should need to modify their torrc file directly.
The preferred way to edit your torrc is through Vidalia. Open the Vidalia Control Panel. Choose Settings. Choose Advanced. Click the button labelled "Edit current torrc". Remember to make sure the checkbox for "Save Settings." is checked. Hit the Ok button and you are done.
The location of your torrc file depends on the way you installed Tor:
On Windows, if you installed a Tor bundle with Vidalia, you can find your torrc file in the Start menu under Programs -> Vidalia Bundle -> Tor, or you can find it by hand in \Documents and Settings\username\Application Data\Vidalia\torrc. If you installed Tor without Vidalia, you can find your torrc in the Start menu under Programs -> Tor, or manually in either \Documents and Settings\Application Data\tor\torrc or \Documents and Settings\username\Application Data\tor\torrc.
On OS X, if you use Vidalia, edit ~/.vidalia/torrc. Otherwise, open your favorite text editor and load /Library/Tor/torrc.
On Unix, if you installed a pre-built package, look for /etc/tor/torrc or /etc/torrc or consult your package's documentation.
Finally, if you installed from source, you may not have a torrc installed yet: look in /usr/local/etc/ and note that you may need to manually copy torrc.sample to torrc.
If you use Vidalia, be sure to exit both Tor and Vidalia before you edit your torrc file. Otherwise Vidalia might overwrite your changes.
Once you've changed your torrc, you will need to restart Tor for the changes to take effect. (For advanced users on OS X and Unix, note that you actually only need to send Tor a HUP signal, not actually restart it.)
For other configuration options you can use, look at the Tor manual page. Remember, all lines beginning with # in torrc are treated as comments and have no effect on Tor's configuration.
Spero di esserti stato d'aiuto
