I see that a lot of people are trying to find the file location so I decided to write a quick post telling you where it is:

In a normal Ubuntu installation the Tor browser gets installed on the Desktop so you can find the torrc file in the following location:

Home > Desktop > Browser > TorBrowser > Data > Tor

The default torrc file looks like this:

# This file was generated by Tor; if you edit it, comments will not be preserved
# The old torrc file was renamed to torrc.orig.1 or similar, and Tor will ignore it

DataDirectory /home/user/Desktop/Browser/TorBrowser/Data/Tor
GeoIPFile /home/user/Desktop/Browser/TorBrowser/Data/Tor/geoip
GeoIPv6File /home/user/Desktop/Browser/TorBrowser/Data/Tor/geoip6

Hope this was helpful. Have a good one!